8 hrs to be exact... Why does it take a lot less?

One other possibility is a leak from the oil breather lines at the rear of the engine . I got this problem a while ago fixed under extended warranty. Whatever the leak is they should be able to easily locate the source IMO.

I've changed that too. There is nothing that hasn't been changed on this X. IMO it is probably, something that hasn't been tightened enough and now its a very slow leak.

No, I'd expect to be a long process. Just wanted to see how long it takes with these things..

My bet is still on the cam seals..

How many miles on your car?

And has it always been sythetic oil changes, or did you go from castor to synthetic?

You are probably right. Is that a tough job? I have the warranty thank God, but my point is how long and where is it? Thanks...

I have an 01 X5, with 83000 miles...And yes I go from Castrol to Synthetic... Why?

They're at the very back of the cylinder head.

They're? So you mean theres more then one? Sorry but as you can see I have no idea about this subject. Thanks...

I thought front seal is between engine and tranny. Rear seal, tranny and drive train. If that is true, whats so funny?