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1,6,7,8 - Series and Mini Cooper General Chat related to models that do not fit into particular categories above. Please try to put your discussion in more appropriate sections. This section does cover the 1 Series, MINI Cooper and 8-Series vehicles: BMW 830i, BMW 840Ci, BMW 850i, BMW 850Ci, BMW 850CSi, M8, Alpina B12, BMW CS Concept and others.

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Old 03-12-2010, 08:09 AM   #1 (permalink)
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Is it normal to be burning oil like this?

It seems like every 1.5 months I am putting another quart in the engine. I perform all service regularly and drive moderately. Is any way to avoid this or limit the oil consumption? 2002 745i 150k mi.
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Old 03-12-2010, 08:15 AM   #2 (permalink)
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It could be the OSV(?). To check if its faulty, start the car and let the idle stabilise, then pull out the engine oil dipstick, if you hear a slight suction noise and the idle changes, you'll need to get it changed over. I am sure that there will be other more experienced people that can give you more advice and pointers on this. Good luck.
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Old 03-12-2010, 09:15 AM   #3 (permalink)
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Does the car run ok ? as Brett has said it could well be the PCV valve, indications of failure are as Brett has said dipstick slurp but they do slurp slightly so it has to be a quite audible slurp sound, smoke from the exhaust on start up this doesn't last long best to get somebody to look while you start up, lumpy idle at cold also check over all the engine for leaks especially the sump and oil filter lines from the housing.
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Old 03-13-2010, 12:43 AM   #4 (permalink)
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Quote:
Originally Posted by TomT745 View Post
It seems like every 1.5 months I am putting another quart in the engine. I perform all service regularly and drive moderately. Is any way to avoid this or limit the oil consumption? 2002 745i 150k mi.
This is a "gray" area with bimmers...

I have seen many well maintained and healthy bimmer engines use up to a quart of oil every 1000miles, and this is considered my many BMW gurus as "normal".

As well, I have seen some that do not consume much of oil either.

If you are in doubt about ur oil consumption... then do a tune up and do a compression check. Compression readings will provide some proof as to whether your engine using more oil than it should.(if compression readings turn out normal... you have not much to worry about).
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Old 03-13-2010, 12:23 PM   #5 (permalink)
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Car runs great, never a problem, no leaks. I just topped it off with a quart today and recorded the miles. I'll just wait and see when it needs another quart and go from there.
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Old 03-13-2010, 02:01 PM   #6 (permalink)
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