So I have a 2007 Acura TL type s. 108k miles with very good records. When I change my oil it doesn’t burn until about 2k miles on the oil and then it turns black and burns A lot oil. It’s fine when the oil is fresh though. Does anyone else have this problem?

 

burn as in you notice a decrease in oil? or..?

 

smoke coming out of the exhaust?

 

No smoke, I do get lots of black soot in my exhaust( although I have hfpc and not 3rd cat). The oil burning is getting really bad. It seems to happen when my oil gets black after 2k miles on the oil. I’m almost burning a quart a week and I drive an average amount. Although I do drive the car hard. Like very hard. I’m always flooring it and downshifting it. I think lots of engine braking can cause it to burn more oil because the engine is in a vacuum. I’m going to change my oil and see if I goes away. I also use 5w30 because I feel like 5w20 isn’t enough for the way I drive the car and how hot I can get the oil.

 

still dont have no clue what you're speaking of..
instead of using the word burn, perhaps the better terminology is eat?
Does the car eat oil, meaning....its a quart low for example?

the color of oil has NO bearing on if the engine is eating or burning oil.
Some types of oil will get black, just like your example at 2K miles...

 

I guess it eats oil. I have no leaks but I’m alway losing oil. My only guess is that it’s burning it. I have a new pcv valve and oil catch can and I don’t get much in my oil catch can.

 

how much are you losing? How do you know you're losing oil?

 

Try using some BG engine cleaner down the spark plug holes and that can clean up some carbon clogging the oil control rings if they are the issue causing oil burning.

 

bad PCV?

 

About every week I have to add a quart of oil. One quart brings it back up to the top of the crosshatching on the dipstick and then a week later, it’s at the bottom of the crosshatch dipstick. I use penzoil 5w30 and I change my oil at about 40-50% oil life. When I was on 5w20 Mobil 1 I wasn’t eating as much oil but it did the same thing where it doesn’t consume a drop until about 2k miles and then it just starts eating oil but it wasn’t at this fast of a rate. Maybe about a quart a month on Mobil 1.

 

The first couple of checks that come to mind are:

1. PCV
2. Compression test
3. Leak down test
4. Remove valve covers and visual inspection

 

I have a new pcv valve with a catch can too. Compression test wouldn’t be a bad idea. When I adjusted my valves, the engine has burnt oil on the inside and it’s only on the pcv side. I wouldn’t call it sludge, it’s such a thin film. My accord v6 has the same thing, non pcv side is super clean and the pcv side is “sludgy”. I change my oil very often and the lady who owned it before me changed it often with all the records to prove it.

 

what oil filter are you using? Try pennzoil ultra plat in 5W-30 and see how it burns. How much soot is on your exhaust tips? Any smoke when you sit at redlights and go to move from the mufflers?

 

everything sounds normal, except for the loss of oil.

if no smoke on start up, I wouldnt think the engine was burning it past the ringland.

 

I’m going to change my oil today to liqui moly 5w30 instead of pennzoil 5w30. If it keeps burning then idk. Maybe I’ll try switching back to 5w20. My oil is black and smells extremely burnt. Since oil gets thicker when it gets exposed to extreme heat, maybe that thicker burnt oil on top of using 5w30 is causing it to consume oil. I have no smoke on start up but I do get a lot of soot and sometimes black smoke out my exhaust for just a second when I floor it. But that problem started after getting hfpc and no 3rd cat.

 

the only way one would get to the bottom of it is to tear down the engine to see where the fault is...

Perhaps head gasket?
perhaps ringland issues?

 

If possible, post up a video of said driving style!

 

Is it doing this?

 

The oil control rings are toast sounds like your driving habits suck !!!

 

Sometimes I’ll get black water out my exhaust. I’ve only had it happen when I drive the car and sit idling for almost 10 minutes and then revved it. It’s not much though. All of that started after I went to high flow pre cats and no 3rd cat though. I just changed my oil yesterday to liqui moly so let’s see what happens. I’ll keep y’all updated. Maybe it’s 5w30 causing me to burn oil once the oil gets burnt from the heat. After 2-3k miles on 5w20 it would burn Maybe a quart before I had to change the oil but on 5w30 it burns like a mofo.

 

negative ghost rider, if you truly want to find the cause...the engine will need to be torn down and inspected to find out whats going on

 

In this video you can see the soot that I’m talking about. The car was idling hot for about 10 minutes before I recorded this so there was a decent amount of water built up from steam which I think is kinda normal cause steam is a by product of combustion. No codes on the car and the lambda number is at 1.00 and sometimes goes to .99 or 1.01 so I know the car isn’t running fine. I changed the oil and I’ll keep y’all updated if it keeps consuming oil. If so I’m gonna try sea foam soaking the cylinders and new spark plugs.

 

Simple answer. Carry a quart of oil and top off weekly. Simple. A little oil burning doesn't hurt anything.

 

Keyword. “Little”

 

How much oil are you consuming per 1K miles?

 

Tbh I don’t even know. I just check my dip stick once a week and it’s a quart low. I definitely don’t drive 1k mikes a week. I just put fresh liqui moly the other day at 109,234 and I’ll check in with y’all at 110k or one quart of oil. Whichever comes first.

 

If worst comes to worst, you can always get a junkyard J32A3 and throw that baby in.

Best bet is to just top the oil weekly and enjoy burning it out in the meantime.

 

I would throw a j37a1 in. I wouldn’t downgrade from the j35a8 to a j32

 

You got a TypeS?

 

If it has soot buildup at the exhaust, then it's getting in the cats. It's just a matter of time until they get clogged.

 

I only have hfpc in terms of cats and no 3rd cat. The soot started right after switching to hfpc. And then the oil consumption happened a little later. From what I’ve seen on other threads, soot is common on the j35 as I’ve seen tls and RL owners complain about soot on the bumper and exhaust tips.

 

Almost every car I've owned has put a little soot on the tips. My current Accord doesn't, but the RDX does a little. Haven't cleaned the tips in a few years though. My TL's tips were basically powder coated from soot. LOL. At one point, I thought they had been painted black.

 

i was using a mobil 1 oil filter and 5w30 pennzoil ultra plat. once i used this oil the car started to burn more so i switched to just switched to liqui moly 5w30. No smoke on idle beside some tiny amount of steam depending on the weather and usually only happens when the engine is warming up. No smoke when normally accelerating but when i floor it, somtimes is get a some blackish smoke out the exhaust. This only happens when i dont floor the car for a while and then floor it. i think i have a bad oxygen sensor on my front bank. When i look at my secodary oxygen sensors, bank 1 and bank 2 have different readings. Bank 2 is also less consistant and just so happens to be the bank that had the cat break in half. lol. i think my cat blowing out damaged the oxygen sensor so Imma put new down stream and up steam oxygen sensors in and see if my soot and black smoke goes away.

 

You say it only soots up when you floor it after driving conservatively for an extended period of time.... maybe carbon buildup?

 

yea that’s what I was thinking. High amount of air flow blows everything out. But it still must be running rich for that much soot. And carbon build up.

 

How's your MPG?

 

20 mixed 16 city lol.

Those are the primary o2 sensors. They are giving different readings so I think they are starting to go bad. I’m going to replace them and see.

 

Hows your A/F ratio?

 

it says it’s running at 1.00 lambda or whatever which is good but I think the o2 sensor are lying and the car is actually running rich

 

Yeah. I'd look into that further.