850 High Oil consumption

  • Thread starter Thread starter Stuart Dentt
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Stuart Dentt

Hi all

I have a 850 GLT with 140,000 miles. It has just been serviced, passed
emission tests and has no oil leaks. Yet, it is now doing 350 miles to the
litre of Mobil 1 (0W40 - synthetic). Is this high consumption due to using
Mobil 1? Can any body suggest some diagnostics that an amatur like me can
perform.

Stuart Dentt
 
Stuart said:
Hi all

I have a 850 GLT with 140,000 miles. It has just been serviced, passed
emission tests and has no oil leaks. Yet, it is now doing 350 miles to the
litre of Mobil 1 (0W40 - synthetic). Is this high consumption due to using
Mobil 1? Can any body suggest some diagnostics that an amatur like me can
perform.

Stuart Dentt
Click to expand...

See if there's pressure at the oil cap at idle. If there is air coming
out the oil cap, either your engine is shot or the PCV system is
plugged. The PCV system consists of an oil trap on the side of the
block and hoses that run to the head, block and intake system. If this
is not functioning properly, you can have high oil consumption.
Generally the system clogs up because of inadequate oil change interval
or poor quality oil.

--
Mike F.
Thornhill (near Toronto), Ont.

NOTE: new address!!
Replace tt with t (twice!) and remove parentheses to email me directly.
(But I check the newsgroup more often than this email address.)
 
Mike

Thanks for this info. When I take the dipstick out at idle a pulsatiing
mist comes out.

Stuart Dentt
 
All who are interested

I have now checked the flame trap and it is clear also there is not
discernable pressure at the oil cap. Has anybody got any other tips?

I am trying 15W/40 to see if it makes any difference.

Stuart
 
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