These things use anything from 500 miles/litre to 5000 miles/litre!
My old 3.8 was in the 750 miles/litre category, and my current 3.6 was in the 1500 miles/litre - however, since my last 'proper' valve clearance at Chez Faz it's only needed one top-up and that was this week at about 2750 miles since I did an oil change.
both 3.6 cars i own rarely need to be topped up. 1 is a 89 with 128,000 km and the other is a 92 with 60,000 km. the 89 maybe a half liter every 4,000 km. the 92 have only drive it for 1,000 km but checked the level the other day and it was exactly the same as a month ago
Mine doesn't use a drop between services (which are roughly every 4500-7500 miles) and it gets ragged everytime I go out.
In fact the only time it was using/losing oil was when it was leaking last year
I know this thread is dominated by you e34'ers but I have been looking for an e39 discussion in regards to oil consumption.
My 2000 e39 is using about 2 quarts of oil every 1000 mi.
I know 1 quart is not a shocker but 2?
I run it fairly hard, as it should be run.
No leaks, no smoke. Runs VERY strong(it's fun walking away 95% of cars I come across).
Just hit 100k mi.
Sounds a lot like your valve stem seals have gone south and need replacing. This is a straight forward operation but not knowing your mechanical skills or what tools you have at your disposal you may want to consider having the problem diagnosed by an independant not neccessarily BMW mechanic. I have found, (at least in the Rocky Mountain area), that dealers try to meet their bottom line by screwing the unknowledgeable customer, (probably like that anywhere you go), and independants sometimes are no better. If you have a trusted mechanic he should diagnose it for free. If you cannot find anybody, are mechanically inclined and it is of interest let me know and I'll walk you through teh steps on how to perform the check. Good luck and happy motoring
Wow Gus. Thank you very much! I am technically strong in my line of work(orthotics and prosthetics) so I think I should not have too much trouble getting through it. With your direction of course. You say, "to find out if it is the valve stem seals"? I would be very interested to know how to find this out. I have a decent amount of tools(full metric set). And the tools I don't have you will not have to twist my arm to buy them..
fyi- the guys at BMW say they have no idea why it uses this much oil.ouich