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that's what mine was doing, if you read below, (archive)

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Posted by Gilbert on April 04, 2001 at 20:04:10:

In Reply to: Engine Oil Low posted by Odd-Jarle Kristoffersen on April 04, 2001 at 17:22:20:

and part of the cure was to replace the pcv valves, but I also needed the oil seperator cleaned. There should be strong negative pressure in the crankcase, and mine had turned slightly positive and was using a lot of oil. No sign of it anywhere, it just disappeared.
The mechanic may have done something wrong when he replaced the pcv's, because when I got it back it had huge positive pressure and oil began leaking everywhere and using one quart per 100 miles. Of course, I only went about 200 miles before I realized what was happening.

Anyway, take off the oil filler cap with the motor running and make sure it has negative pressure. With everything cleaned, I could hardly get the cap off, the suction was so high. Before, it was never very much at any time, turning to positive (like blow-by) when things began to plug up. If you're lucky, maybe this, or something just as easy to fix, is all that is wrong with yours. Guy Simpson had some good information on an earlier post.

Also, I had the really bad problem just after the mechanic did the pcv and oil and filter service, etc. I have tried to figure out how they may be connected, as it happened before just after the same type service????

Good luck.
Lin gilbert
1990 750iL

...says my board computer sometimes. IŽll have a shop look at it. I suspect a small leak somewhere. But was wondering if somnebody might have experienced this before (91 750iL).

No chocolate-oil symptoms...No darking of coolant. So the oil just seems to leak out into nothing. I havenŽt seen a drop of oil on my garage floor either. Mysterious little thingy. But hereŽs the background.

Bought the car right after Inspection II where a BMW dealer had changed all oils and filters. Oil was clear and nice. About halfways up the stick between min/max. Milage: 187000 km (divide by 1.6 for miles).

After a medium hard drive at higher speeds (100-120mph) for an hour I stoped to refuel. Then the Engine Oil Low warning came on. Waited 10 minutes to let the oil settle and checked. Just on minimum mark. Refilled about a liter of oil... This was at about 187500 km.

Took it a bit easier just in case and the warning didnŽt show until about 189000 km after I had done several kickdowns and fast drive bys. Hey, a V12 can be fun ;) Same thing. Refilled about a liter.

Now today it again showed after I did a series of accelerations. This is at about 191000km...

It seems that if I rev the engine for a longer period or drive "hard" it looses oil. Or it could just be a coincident, and that it looses oil at a slow rate.

Any ideas what it is? Like I said, IŽll have a shop look at it soon to correct it anyways.

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