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Old 04-18-2019, 08:48 PM   #1
chris103549
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Oil consumption issue is magically gone. Or is it? Theories?

I've had my 325i for a year or so and it's always consumed oil. Maybe a half quart every fill-up, more or less. I don't know why that is exactly but it seems common enough for a 2002 BMW with 165k miles, so I am fine with it. I just make sure I always have oil in it and at this point consider it a non-issue (right or wrong).

All my driving is pretty much city driving and not for long distances. The most I drive is maybe 45 minutes at a time, stop and go.

Fast forward to a week ago when I decided to drive 2300 miles out to Oregon. I made sure I had a big 5 quart bottle of Mobil 1 in the trunk, some blue coolant, spare coolant expansion tank, etc and off I went. My first fill up, I needed some oil. My second fill-up too I think, but after that, I swear I didn't lose a drop for the next 1500+ miles over 3 days of 10-12 hour highway driving. It got to the point where I was thinking my dipstick was lying to me, so I added some oil anyway just to make sure the level increased a little.

So my question is, does it make sense that a long highway drive (4th/5th gear and revving all day) can literally make my car stop consuming oil? And does it give me some clues as to why I was consuming oil? Was/is my issue the CCV? If anyone has any theories about what's going on, I would very much appreciate hearing them.

I am back to city driving now in Oregon so my guess is the oil consumption problem will come back... We'll see soon!
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Old 04-18-2019, 09:11 PM   #2
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Old 04-18-2019, 11:05 PM   #3
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It could be that the long drive cleaned out your CCV, what grade of M1 oil are you using? 0w-40 I hope.
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Old 04-19-2019, 12:15 AM   #4
chris103549
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Originally Posted by jmo69 View Post
It could be that the long drive cleaned out your CCV, what grade of M1 oil are you using? 0w-40 I hope.
Yep, 0w-40.
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Old 04-19-2019, 11:35 AM   #5
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Rings were stuck but with regular oil changes they became unstuck?




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Old 04-19-2019, 11:58 AM   #6
chris103549
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I'm hoping my long drive cleared out my CCV like jmo69 said!
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