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Too much oil?-Oil Dilution with Gasoline

 
Old 03-16-2019, 02:45 PM
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Too much oil?-Oil Dilution with Gasoline

My RDX engine oil has a very strong gas smell. The dip stick oil is above the full mark. Today I decided to change my oil 4+ months and 1760 miles on the odometer (70% oil life left). From observation the old oil is very thin like water, a bit yellow/green color. It was not black. After I fill in 5 quarts of M1 0w-20 full Synthetic oil and put the used oil back in the 5 quarts container to my surprise I fill it up to the rim ~ 6 qts and still oil is leftover. I wonder if the factory overfilled or I have a bad oil dilution. I got a small container and save a small sample planning to send in to Blackstone for oil analysis.

The OM indicate with filter change I need about 5.3 quarts of oil. I only put in 5 qts and check the dipstick. The oil sit between the two black dot. I will check again tomorrow.

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Old 03-16-2019, 03:53 PM
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Your oil has been diluted with gasoline; report this to your dealer immediately.
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Old 03-17-2019, 12:18 PM
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You have oil dilution. I'm dealing with the same thing as well. Reported it to dealer and was told nothing can be done at this time and that Acura Tech Line had no info for the service team. Best bet is to get this reported to your dealer so Acura knows this is a real issue.
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Old 03-18-2019, 01:48 PM
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Have had this going on now for 3 months .. onto my 5th oil change coming up this Saturday. the dealer has been great about it and Acura Canada have been horrible to deal with on this problem. Both times they measured more that 800ml more oil in the engine after they drained it. Acura Canada says they have never heard of this problem before and have no fix for it yet. SO FRUSTERATING.As the engine in the car slowly wears out due to diluted engine oil .
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Old 03-18-2019, 02:21 PM
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Originally Posted by swansong04 View Post
Have had this going on now for 3 months .. onto my 5th oil change coming up this Saturday. the dealer has been great about it and Acura Canada have been horrible to deal with on this problem. Both times they measured more that 800ml more oil in the engine after they drained it. Acura Canada says they have never heard of this problem before and have no fix for it yet. SO FRUSTERATING.As the engine in the car slowly wears out due to diluted engine oil .
I called my Acura dealer and spoke with a service advisor. He said no one reported the issue (US?) with their RDX that he aware of. Bring the car in the next time I notice the issue so they can document /report it. I guess I am on my own now. I have to check oil level each week and make a note of it.

I also requested an oil test kit from Blackstone. I canít wait to send it in for analysis.
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Old 03-18-2019, 02:24 PM
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Originally Posted by swansong04 View Post
Have had this going on now for 3 months .. onto my 5th oil change coming up this Saturday. the dealer has been great about it and Acura Canada have been horrible to deal with on this problem. Both times they measured more that 800ml more oil in the engine after they drained it. Acura Canada says they have never heard of this problem before and have no fix for it yet. SO FRUSTERATING.As the engine in the car slowly wears out due to diluted engine oil .
Agreed...Acura's "we've never heard of this and there's nothing we can do" is beyond frustrating. Interesting how there ARE in fact some of us that have reported the problem, yet they can just play dumb.

Isn't it interesting how problems don't exist and are unfixable until the manufacturer hears about them? If it's not happening to ALL RDXs, that means parts can be replaced and the issue can be fixed.

Last edited by dukeh62; 03-18-2019 at 02:28 PM.
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Old 03-18-2019, 02:39 PM
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Originally Posted by ToniRDX19 View Post


I called my Acura dealer and spoke with a service advisor. He said no one reported the issue (US?) with their RDX that he aware of. Bring the car in the next time I notice the issue so they can document /report it. I guess I am on my own now. I have to check oil level each week and make a note of it.

I also requested an oil test kit from Blackstone. I canít wait to send it in for analysis.
The instant you get the oil sample sent off to Blackstone I would take your car to your dealer and demand an oil change. In addition, I would demand they start what I'll call a, "Reverse oil consumption test", or better said, they perform an oil change and you bring it in every 1,000 miles and have the oil level on the dipstick examined and documented.
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Old 03-18-2019, 07:29 PM
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Originally Posted by horseshoez View Post
The instant you get the oil sample sent off to Blackstone I would take your car to your dealer and demand an oil change. In addition, I would demand they start what I'll call a, "Reverse oil consumption test", or better said, they perform an oil change and you bring it in every 1,000 miles and have the oil level on the dipstick examined and documented.
thatís what the local Acura dealer is doing for us. Every time we see it above the ADD mark to come in and they will change the oil. At least the local dealer is trying. They donít seem to be able to nothing without approval from Acura Canada. It is funny that they have no idea whatís happening but assure me itís not damaging the engine.
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Old 03-19-2019, 10:00 PM
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Originally Posted by swansong04 View Post

thatís what the local Acura dealer is doing for us. Every time we see it above the ADD mark to come in and they will change the oil. At least the local dealer is trying. They donít seem to be able to nothing without approval from Acura Canada. It is funny that they have no idea whatís happening but assure me itís not damaging the engine.
Honda/Acura knows exactly what is happening. Oil dilution has been widely reported with Honda's direct injection turbo engines, especially in cold climates. Honda has rolled out a purported fix for the 1.5 engines in the CR-V.
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Old 03-20-2019, 07:40 AM
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Originally Posted by cruiserchuck View Post
Honda/Acura knows exactly what is happening. Oil dilution has been widely reported with Honda's direct injection turbo engines, especially in cold climates. Honda has rolled out a purported fix for the 1.5 engines in the CR-V.
Yup. There's no mystery here.
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Old 03-20-2019, 09:42 AM
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Originally Posted by cruiserchuck View Post
Honda/Acura knows exactly what is happening. Oil dilution has been widely reported with Honda's direct injection turbo engines, especially in cold climates. Honda has rolled out a purported fix for the 1.5 engines in the CR-V.
I know , and that's what makes it frustrating. Acura Canada says they are not aware of this problem even though Honda Canada has YouTube videos explaining the problem.
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Old 03-21-2019, 02:57 AM
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Originally Posted by ToniRDX19 View Post
The OM indicate with filter change I need about 5.3 quarts of oil. I only put in 5 qts and check the dipstick. The oil sit between the two black dot. I will check again tomorrow.
You need to run the engine briefly to fill the new filter with oil, then turn it off and recheck the oil level. This is standard practice.

The "old" oil probably wasn't black because there aren't enough contaminants yet in the barely used engine. The "green" tint could be molybdenum disulfide from the engine assembly grease. And in case you haven't smelled enough grease, that stuff stinks!

Not saying there couldn't be gasoline dilution of the oil, but I don't find current observations compelling. Did you ever get an analysis done?
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Old 03-21-2019, 05:14 AM
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My oil was high on dipstick and I brought it in. They told me it must have been delivered to me with too much oil and they drained a bit. It ďwasnít high enough to cause issuesĒ. Itís now still above the high level mark, unless i donít know how to read the dipstick (quite possible). Any suggestions?
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Old 03-21-2019, 05:15 AM
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Old 03-21-2019, 09:32 AM
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that's what the dealer told me also. that it may have come from the factory with a high oil level. so when they did the oil change they made sure it was right on the full line. lo and behold 2 weeks later the oil was above the orange plastic part of the dip stick. so, they changed it again . on Saturday this will be the 5th oil change since December.
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Old 03-21-2019, 09:38 AM
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Originally Posted by swansong04 View Post
that's what the dealer told me also. that it may have come from the factory with a high oil level. so when they did the oil change they made sure it was right on the full line. lo and behold 2 weeks later the oil was above the orange plastic part of the dip stick. so, they changed it again . on Saturday this will be the 5th oil change since December.
Yup, after I brought the issue to my dealer's attention, they drained the oil and refilled it to the exact suggested specs just to confirm it had the correct amount of oil in the engine. 1,200 miles later it was up over the plastic piece on the dipstick.
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Old 03-21-2019, 12:57 PM
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Originally Posted by Colin Whooten View Post
My oil was high on dipstick and I brought it in. They told me it must have been delivered to me with too much oil and they drained a bit. It ďwasnít high enough to cause issuesĒ. Itís now still above the high level mark, unless i donít know how to read the dipstick (quite possible). Any suggestions?
Run the engine, turn it off, and let it sit a minute or two for the oil to drain into the sump.

Pull out the dipstick, wipe it, then reinsert it completely ( past the seal ) and pull it out immediately. In the photo, it looks to me like the dipstick wasn't wiped.

Sometimes it's hard to get a "clean" reading because residual oil from the side of the dipstick tube gets on the dipstick. You shouldn't see stray oil way up the dipstick like I see in the photo. Repeat as necessary.
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Old 03-22-2019, 12:35 AM
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Originally Posted by swansong04 View Post
It is funny that they have no idea whatís happening but assure me itís not damaging the engine.
LOL, fuckers.
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Old 03-22-2019, 12:36 AM
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Originally Posted by cruiserchuck View Post
Honda has rolled out a purported fix for the 1.5 engines in the CR-V.
What was the "fix?"
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Old 03-22-2019, 04:19 AM
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Originally Posted by Alias1431 View Post
What was the "fix?"
The fix was a software update and an oil change. I got it done on my Civic 1.5T and problem is a lot worst after the update. The oil level is 1-2 mm above the orange bar and oil is still at 90%. I even made sure it was at the good level after I came back from dealer. I had to remove oil because they overfilled. I do not idle the car and drive at least 45 minutes each ride. Not gentle with the throttle either. Did my oil change myself for the past 3 years and oil dilution was very low before the TSB. I was going to trade in my civic for a RDX but I think we are done with honda. Past 3 honda vehicle had engine problems.
2008 Civic 1.8 engine block cracked
2012 MDX 3.7 oil consumption
2016 Civic 1.5 Bad oil dilution

Not a good track record for a motoring company.
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Old 03-25-2019, 10:00 AM
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Took my RDX for its 5th oil change on Saturday. they said they wont be able to get to it until Monday due to the Tech line not being open on the weekend. So I had asked if they had seen this in any other RDX's with this problem and the service advisor told me no they had not. so since the car will be in the dealer for a few day they gave us a new RDX to drive. when I got home I took it upon myself to check the oil in it. well wouldn't you know it. it has the same dilution problem we have. this car only has 2200km on it ..
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Old 03-25-2019, 10:20 AM
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I'm meeting with a District Manager about my oil dilution issue this week.

Would all of you mind sharing the dealership (and city/state) where you have reported your oil dilution issue? I would like to supply him with a list of dealers who have reported the issue to tech line.

Thank you!
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Old 03-25-2019, 05:46 PM
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Originally Posted by dukeh62 View Post
I'm meeting with a District Manager about my oil dilution issue this week.

Would all of you mind sharing the dealership (and city/state) where you have reported your oil dilution issue? I would like to supply him with a list of dealers who have reported the issue to tech line.

Thank you!
Schaller Acura; Manchester, CT

I am checking oil dipstick every week. Now Spring is here, warmer temps and I drive more oil dilution is not as bad if any.

I sent in my oil sample to Blackstone. Will publish the results when I get it. I also stock up on motor oil and Honda filters. I just change it in a few thousand miles at $30 per oil change ($24 full synthetic, $6 Honda oil filter) and 45 mins of my time. I enjoy working on my cars and l take my time instead of service shops rushing thru.

I do consider environmental impact so I minimize unnecessary oil changes. I recycled all my used oil to a local auto shop.

Last edited by ToniRDX19; 03-25-2019 at 05:48 PM.
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Old 03-25-2019, 07:45 PM
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This is what Iím going to end up doing I think. I will be very interested in your oil analysis results.

Originally Posted by ToniRDX19 View Post
Schaller Acura; Manchester, CT

I am checking oil dipstick every week. Now Spring is here, warmer temps and I drive more oil dilution is not as bad if any.

I sent in my oil sample to Blackstone. Will publish the results when I get it. I also stock up on motor oil and Honda filters. I just change it in a few thousand miles at $30 per oil change ($24 full synthetic, $6 Honda oil filter) and 45 mins of my time. I enjoy working on my cars and l take my time instead of service shops rushing thru.

I do consider environmental impact so I minimize unnecessary oil changes. I recycled all my used oil to a local auto shop.
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Old 03-25-2019, 11:53 PM
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Old 03-29-2019, 03:25 AM
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Dunno what they're doing on the engineering, but Honda has a nice PR campaign going.

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Old 03-29-2019, 07:31 AM
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Originally Posted by Wander View Post
Dunno what they're doing on the engineering, but Honda has a nice PR campaign going.

https://www.youtube.com/watch?time_c...&v=fVdKNRgzGT8
Isn't this video MINDBLOWING??? "We understand many of you are having a major problem with oil dilution. Here is what is causing that problem. Have a nice day."
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Old 03-29-2019, 07:55 AM
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The main thing is for anyone experiencing this issue, if the dealer tries to say they don't know about it and for you to go on your way and "report it next time" definitely don't accept this. Tell them to look at it right now and they'll smell gasoline, point to this thread and others on the Honda showing this is a KNOWN ISSUE. While they may not be able to fix the underlying cause at the moment because they don't have a TSB or other doc outlining the root cause and what to fix, they certainly can and should change your oil regularly for free until they've come up with a fix for this issue. Driving for extended periods of time with diluted oil puts your engine at risk for damage. Cheaper for Acura to pay for a few oil changes then to replace your engine. At the very least I'd demand they perform an oil change on the spot (for free) and would continue to do this regularly until the underlying cause can be addressed. There is no way they can argue it's normal for gas to be mixing with your engine oil or for your oil to be diluted and "runny".
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Old 03-29-2019, 10:19 AM
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This is what my dealership has been doing. but when they go to communicate the issue to Acura Canada they seem to hit roadblocks. Acura Canada has been totally unreasonable with this issue. basically letting me know that until there is more cases of this issue there is nothing they will do unless there is catastrophic failure. CRAZY. Acura Canada is horrible.
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Old 03-29-2019, 11:09 AM
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Originally Posted by swansong04 View Post
This is what my dealership has been doing. but when they go to communicate the issue to Acura Canada they seem to hit roadblocks. Acura Canada has been totally unreasonable with this issue. basically letting me know that until there is more cases of this issue there is nothing they will do unless there is catastrophic failure. CRAZY. Acura Canada is horrible.
Yeah that's stupid. At the very least they should be listening to customers/dealerships that report this and other issues if for no other purpose then to identify widespread issues or defects that may result in a recall. If they aren't logging complaints, they won't ever notice that something is a problem for more than one vehicle. Ignoring that part for a second, it's NOT NORMAL for gasoline to be mixed with your oil causing the oil to be diluted. Whether it is widespread or not is irrelevant to your vehicle. Your vehicle has an issue that needs to be corrected.

So when talking with them I'd just say absolutely be forceful that it isn't acceptable for them to say they won't do anything to fix the underlying problem, all they are doing is masking the symptoms by changing your oil frequently. Whatever is incorrectly causing gasoline to get into your oil isn't being addressed and as such the problem will continue indefinitely until they address the underlying cause for this happening in the first place. The mechanics at the dealership should be able to argue that this isn't normal for a vehicle. Escalate to a district manager with Acura or something if necessary (assuming Acura Canada has a similar structure as Acura USA)
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Old 03-29-2019, 12:05 PM
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To be fair, there is an ongoing campaign ( voluntary recall ) of CR-Vs with the 1.5T to install new engine control software and A/C control software ( and sometimes replace the A/C controller ) in order to allow the engine to heat up more rapidly under cold conditions.

They are taking a tiered approach to the recall, beginning in Canada and northern US states, since colder conditions are more likely to provoke the issue. My daughter's CR-V has had the "fix" performed, including replacement of the A/C controller.

Whether this fix will be sufficient isn't yet established.

The extent to which this problem may affect vehicles with the 2.0T isn't yet established.

Whether Honda was aware of the issue and implemented mitigating design elements in the 2.0T and its controllers isn't known.

Whether there will be a "fix" for the 2.0T isn't known.

FWIW my oil level is just above the orange plastic on the dipstick, maybe half a quart high, but it doesn't smell like gasoline. I have not monitored the level over time. I'm at 30% and have not yet had a change, although I bought it last June and drove it occasionally through the winter. I've mostly been driving another vehicle.

I'm monitoring the situation, but I'm not freaking out. YMMV

Last edited by Wander; 03-29-2019 at 12:12 PM.
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Old 03-30-2019, 01:29 PM
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Originally Posted by Wander View Post
To be fair, there is an ongoing campaign ( voluntary recall ) of CR-Vs with the 1.5T to install new engine control software and A/C control software ( and sometimes replace the A/C controller ) in order to allow the engine to heat up more rapidly under cold conditions.

They are taking a tiered approach to the recall, beginning in Canada and northern US states, since colder conditions are more likely to provoke the issue. My daughter's CR-V has had the "fix" performed, including replacement of the A/C controller.

Whether this fix will be sufficient isn't yet established.

The extent to which this problem may affect vehicles with the 2.0T isn't yet established.

Whether Honda was aware of the issue and implemented mitigating design elements in the 2.0T and its controllers isn't known.

Whether there will be a "fix" for the 2.0T isn't known.

FWIW my oil level is just above the orange plastic on the dipstick, maybe half a quart high, but it doesn't smell like gasoline. I have not monitored the level over time. I'm at 30% and have not yet had a change, although I bought it last June and drove it occasionally through the winter. I've mostly been driving another vehicle.

I'm monitoring the situation, but I'm not freaking out. YMMV
A software update to get the engine to heat up faster seems like a pretty hacky way to address a design flaw. All it does is masks one issue, but doesn't resolve the underlying cause.
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Old 03-31-2019, 12:15 AM
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Yeah, what I don't understand is why this problem isn't cropping up in similar direct-injected turbo engines from other manufacturers. Or is it?
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Old 03-31-2019, 09:01 AM
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Originally Posted by Wander View Post
Yeah, what I don't understand is why this problem isn't cropping up in similar direct-injected turbo engines from other manufacturers. Or is it?
Yes the oil dilution issue does show up in other DI engines; it varies by manufacturer.
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Old 04-06-2019, 08:46 AM
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Originally Posted by ToniRDX19 View Post
Schaller Acura; Manchester, CT

I am checking oil dipstick every week. Now Spring is here, warmer temps and I drive more oil dilution is not as bad if any.

I sent in my oil sample to Blackstone. Will publish the results when I get it. I also stock up on motor oil and Honda filters. I just change it in a few thousand miles at $30 per oil change ($24 full synthetic, $6 Honda oil filter) and 45 mins of my time. I enjoy working on my cars and l take my time instead of service shops rushing thru.

I do consider environmental impact so I minimize unnecessary oil changes. I recycled all my used oil to a local auto shop.

Toni that sucks man. I'm in CT too and wanted to buy an RDX ASPEC next year. I was originally going to purchase a CRV but the oil dilusion issues there are pronounced. What a shame the RDX is having similar issues. Does anyone know if the CTR has similar issues? I really want the RDX but won't sink hard earned money into a car with this kind of issue. I currently have an Insight at 236,000 miles and going strong. Need an suv that will last similarly as long.
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Old 04-09-2019, 03:27 PM
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Originally Posted by Mluisgr81 View Post
...Does anyone know if the CTR has similar issues? I really want the RDX but won't sink hard earned money into a car with this kind of issue. I currently have an Insight at 236,000 miles and going strong. Need an suv that will last similarly as long.
Postal Office lost my package. Waited a week after I shipped to Blackstone but the status did not change. Called USPS to create a case. After searching the warehouse/shipping they found the package(little container with 3 oz of used oil inside). Ship status changed to ďdeliveredĒ on Friday, 4/5/19. I guess the oil analysis will come anyway now. Blackstone did not charge my debit card yet.

Weekly oil dipstick check indicates normal reading (below full mark). I wonder if the cold weather, long Idle w/remote start and short trips contributed to the oil dilution. The other theory is oil overfilled from the factory.

I will share the results once I get it. Vehicle has less than 2,500 miles.
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Old 04-09-2019, 03:32 PM
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Originally Posted by ToniRDX19 View Post
Postal Office lost my package. Waited a week after I shipped to Blackstone but the status did not change. Called USPS to create a case. After searching the warehouse/shipping they found the package(little container with 3 oz of used oil inside). Ship status changed to ďdeliveredĒ on Friday, 4/5/19. I guess the oil analysis will come anyway now. Blackstone did not charge my debit card yet.

Weekly oil dipstick check indicates normal reading (below full mark). I wonder if the cold weather, long Idle w/remote start and short trips contributed to the oil dilution. The other theory is oil overfilled from the factory.

I will share the results once I get it. Vehicle has less than 2,500 miles.
Thanks. I'm going to be sending sample out to Horizon/Polaris for testing soon, as well. Just waiting for my testing kit to be delivered.
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Old 04-10-2019, 01:37 AM
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Originally Posted by fiatlux View Post
A software update to get the engine to heat up faster seems like a pretty hacky way to address a design flaw. All it does is masks one issue, but doesn't resolve the underlying cause.
100% this. I don't want a hack. I don't want higher RPM's when the engine is cold to make it warm faster. I don't want a software fix for a hardware problem. Acura needs to address the root cause, not the symptoms.
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Old 04-10-2019, 12:20 PM
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Originally Posted by ToniRDX19 View Post
Postal Office lost my package. Waited a week after I shipped to Blackstone but the status did not change. Called USPS to create a case. After searching the warehouse/shipping they found the package(little container with 3 oz of used oil inside). Ship status changed to ďdeliveredĒ on Friday, 4/5/19. I guess the oil analysis will come anyway now. Blackstone did not charge my debit card yet.

Weekly oil dipstick check indicates normal reading (below full mark). I wonder if the cold weather, long Idle w/remote start and short trips contributed to the oil dilution. The other theory is oil overfilled from the factory.

I will share the results once I get it. Vehicle has less than 2,500 miles.
sent my oil sample into Finning Canada Fluid Analysis. should be getting it back shorty.
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Old 04-11-2019, 11:14 AM
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Originally Posted by Wander View Post
To be fair, there is an ongoing campaign ( voluntary recall ) of CR-Vs with the 1.5T to install new engine control software and A/C control software ( and sometimes replace the A/C controller ) in order to allow the engine to heat up more rapidly under cold conditions.

They are taking a tiered approach to the recall, beginning in Canada and northern US states, since colder conditions are more likely to provoke the issue. My daughter's CR-V has had the "fix" performed, including replacement of the A/C controller.
Can someone explain the relationship between the A/C controller and the oil dilution problem on the Honda engines? Does oil dilution lead to failure of the A/C controller somehow? For the CR-V issue, it seems the cabins were not warming up fast enough due to too efficient heat absorption by the turbos (at least that's my understanding based on this website)

Last week as the weather warmed up I realized the A/C in our 2019 AWD Tech is not cooling at all. The feel of the air remains unchanged despite the temperature setting, whether the system is on automatic or manual mode (you can manually turn the A/C on or off), or whether the car is warmed up or not.

According to the MM, oil life reached 10% around 4000-4500 miles so I had the oil changed at the dealer in January. As of now, we have 5520 miles and oil life is already at 60% on the MM. According to this post, the MM does not physically monitor the oil at all, so perhaps this number is reflective of our driving patterns. On that topic, we continue to get terrible MPG with 95% city, mostly <40 mph, stop and go traffic. Fuelly has my average at 15.9 mpg, might be a touch better with 93 octane vs 91 or lower. Sport mode for the majority of the time.

I wonder if these issues (A/C failing, oil life prematurely wearing, poor MPG) are all related. I have an appointment Saturday for the dealer to take a look at the A/C. I also have a Blackstone kit with me so I'll try to send the oil sample this afternoon or tomorrow.
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