Moisture could build up if PVC not working properly or during many short trips. Oil typically has little creamy color when that happens. I’d send that oil for analysis, they will check for fuel dilution percentage. Something to keep ab eye for sure, maybe something not functioning properly

Any funky white sludge under your oil cap? Thats another sign for moisture build up. Whatever you have does not sound normal, but would be intresting to confirm for sure if its moisture vs gas

I know what you mean about the cap, no there is nothing on it.
I just ordered an oil analysis kit from Blackstone-lab.com and hopefully have some results in a few weeks.

Way too much reading in here, so I don’t know if it was brought up already, but, I don’t see anything wrong with your oil level. It’s between the max and min lines. You’re safe.

You’re assuming that the engine oil was filled right to the top when you bought the car. Truth be told, this isn’t necessry (hence the minimum oil level line). To me, it looks like you were more or less in the middle of the dipstick. Nothing wrong with that.

Now, if the oil level was full and is down that much... that’d be a bit of a concern. Does the engine just naturally take/eat oil, or was it simply under filled from the factory? Either way, I highly suspect *zero* damage has occurred to your engine.

This was my oil level when I checked it a couple days ago. (Believe me I know how to check the oil level) I changed oil and filter roughly 4 months/4K miles ago, and I left it at just below the MAX mark. So, all this extra must be from un burned fuel diluding the oil.

This is after I changed the oil and filter now, and I left it a little lower than I normally would, so I can have better readings since I’m planning to keep checking it weekly.
My photos may be a little confusing. Here’s a little more explanation.

Interesting read.

https://www.spectrosci.com/product/q...4d104badbb2999

Also an informative YouTube video

The video guy likes to be a bit corny at times but if you listen to the entire video he makes a lot of great points.

Shortly after buying my 2019 RDX Advance, I read some posts regarding the oil dilution issues in the 1.5T engine. I checked my oil level with about 25 miles on the RDX and it was at the full mark, but already smelled a bit like gasoline. Have been checking the oil level for several months and have not seen any change (800 miles now). I had a 2008 RDX Turbo (Port Injected) and never noticed any issues with oil level over 50K miles or gas odor when changing oil.

Here is my take on this:
Unless one believes that the guy in the YouTube video is a car manufacturers schill this oil dilution thing is “known” by the engine designers of Direct enjection engines. Thus they’ve likely taken additional steps to account for this with the design, type of oil requirements, oil changes via the maintenance minder etc. Since the car still comes with the same warranties (main car & powertrain warranties) I’m not worried about the engine having issues due to some oil dilution.
The only scenario I’d keep an eye on is the extreme oil dilution where the oil levels rise enough to warrant concern (which unfortunately we don’t have information on the exact amount of overage to watch for) and then change the oil a little more often. This seems most likely to affect the drivers that take a lot of short trips from the reading I’ve done as that would contribute to the most fuel dilution in the oil.
Again I am not that alarmed by this happening as it’s known to happen in most DI engines to some extent.

I find smell of gas misleading. Its normal to have 1-2% of gas in oil, so it might smell a little. When oil is hot, its more smelly. This is not scientific. You can monitor by excess level or by oil test

I wouldn’t necessarily take the dealer brushing it off as meaning we are totally in the clear.

I don’t know how you extract the dealer blew it off. Based on this thread, I checked and thought I smelled gasoline in my oil. But at the dealer, that was debunked as my sniffer tested other new cars with the same smell. Dealer then tested the vehicle. All was good. Dealer noted the warranty would cover something like this, should it become an issue. I know some people detest dealers and I get it. But in this instance, I was mistaken in my initial conclusion based on what I’ve already shared.

Good point!

Keep us posted, OP. I’m a frequent lurker on Bob is the oil guy, and the consensus with that site’s oil “experts” is that Blackstone’s equipment is inferior to other labs in directly measuring/detecting fuel in oil. You’ll get more from the cold and hot viscosity measurements being low to your oil’s original spec. than the % of fuel reading. Can’t wait to see your UOA posted here.

be sure to smell the oil from a few other new cars at the dealer. That’s how I learned the smell of my oil was normal. It may be an issue of the breakin oil smell.

Here is my Blackstone-labs oil analysis report, I just got it today.

Oh fu***. That sucks.
you need to speak with service manager and demand answers from corporate. Its a high delution for new car.

I’m betting your RDX is not the only one that has this issue. Fuel dilution is a nature of the beast with direct injection, made a bit worse with turbos, motors these days. It seems as though the short trips on a regular basis is the biggest contributor for this happening from all of the reading I’ve done on this subject.

what is the fix? My understanding they have ECU update for 1.5T, but it’s not clear if this actually fixes the problem or just makes it less of a problem.

how much short trip is short, did he have car running for less than 10-15 min for the most miles he put? Say 90% of time car had less than 10 min trips?

You not going to notice a difference in how car drives with diluted engine oil. But it will slowly damage the engine if this is happening for number of years.
The oil report is a strong evidence that there is something wrong. Sometimes you need to raise hell with corporate for them to do anything, otherwise they will try to brush it off.
If it would be my car with that oil report I would be talking not only with service manager, but also honda corprare and have them open a case.