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Oil Cunsumption

 
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Old 09 Aug 2008, 05:25 pm
Fresh Cruiser
 
Join Date: Jun 2008
Posts: 11
Cool Oil Cunsumption

I have a 2001 PT with 68,000 miles. For the last year it has been consuming 1 qt. of oil per 1500 miles. It is now using 1qt. per 1000 miles. I have replaced the PCV valve last week and there was no oil on it when removed. There are no oil leaks nor any smoke. Anyone famaliar with this problem?
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Old 09 Aug 2008, 06:15 pm
Obsessed Cruiser
 
Join Date: Sep 2001
Posts: 27,744
Default Re: Oil Cunsumption

Only thing I can think of is a very small crack in the head gasket. or a bad piston ring. A very tiny use of oil into the mainstream won't leave the tell-tale smoke out the exhaust.

Found on the internet........

It will tell you if your engine has good compression. An engine is essentially a self-powered air pump, so it needs good compression to run efficiently, cleanly and to start easily.

As a rule, most engines should have 140 to 160 lbs. of cranking compression with no more than 10% difference between any of the cylinders.

Low compression in one cylinder usually indicates a bad exhaust valve. Low compression in two adjacent cylinders typically means you have a bad head gasket. Low compression in all cylinders would tell you the rings and cylinders are worn and the engine needs to be overhauled.
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