I changed my oil about 7,500 miles ago. Since then, I've had to add a total of about 2.5 quarts (Mobil 1 0W-40). There is no leak (my garage floor is clean). It's a 2002 325i with about 130,000 miles. Any thoughts?
its normal.. i am running same oil grade as you are and brand.. i suually do 7.5 quarts in my 330.. and after about 3000miles i would have the oil light come on, and i just add about a quart go for another 1 thousand miles, then i change it..
i usually tend to change my oil at 3500-4000 miles..
A sudden change in oil consumption is a bad sign. Be on the lookout for anything amiss.
Also, watch for blue exhaust smoke when you start the engine cold. You might miss the smoke that bad valve seals generate because the exhaust would be normal most of the time. Doesn't sound like a prime candidate in your case, but easy enough to check more carefully for it.
Touch wood... my 99 328i has 115K miles, the oil's been changed every changed every 15K miles and it uses not a drop. I've had the car since new; break-in was gentle for the first 1000 miles (no more than 3500 rpm and 3/4 throttle) and after that the rev limiter was checked with some regularity once the engine was up to temp.
I know it's been almost four months since this thread's been ttt, but to those with this problem, does your exhaust smell bad at W.O.T? I've been burning oil and it's starting to become exponential. It's causing enough concern for me that I have to do something about it. What could cause this?
(I do have 80k mi. now and please don't tell me this is normal)
Burning oil does smell bad, usually a little like rotten eggs because of the sulfur in the oil. However, it's normal to burn a little at W.O.T. From my long years of Toyota ownership, to this day I recognize the smell of a Toyota engine burning oil while under high load.
I wouldn't panic about burning oil just because you're flogging the car. I'm at 70K miles myself, and my engine (the 3.0) continues to consume a quart about every 4K miles, just like when it was new.
"Exponential" oil consumption on the other hand sounds bad. Can you be specific about how much you're consuming now and at some point in the past?
Have you checked your air filter recently? Our 330ci had a crap aftermarket cone filter which had got clogged with dirt. The vehicle was struggling to breath and as such was running hotter and was using much more oil. She's happier with a clean filter. One thing to note is that if you don't have a stock filter and you take it for service they seem to leave this alone. So much for the complimentary cleaning with an oil change!
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