Vance:  My oil pressure is not teriffic, but usable I guess at 75 lbs cold and 
45-50 at highway speed.  
 
I tried Mobil 1 15-50 last summer, but didn't notice any better hot pressure 
over Castrol 20-50.   So far I don't know why I would use synthetic again.
 
I guess I should consider dropping the oil pan and changing the rod and main 
bearings as some have suggested in other posts.   My oil presuure might 
increase to 50-55 if I rev to 4000 on the highway.
 
regards, Bruce Simms CF1941UO
 
 
 
 
 
 
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