My 1991 RS with 305 engine and 130,000 miles has started to show low oil pressure at idle. When the engine is cold and the rpm's are up, or when you are driving, the pressure seems okay, but once warmed up and at idle, it is very low. I have checked and the oil level is not low, and have not noticed any unusual sounds or rough idling. I want to keep this one running a while longer, but don't want to put a lot of money in it. Any suggestions as to diagnose the problem? I have never had any problems with engine prior to this.

Thanks for your help.

 

A cheap oil PSI booster is run a heavier oil. . .
if you got 3w-30 or 10w-30 now go to a 10w-40 if you have a 10w-40 go to a 20w-50. . .

I ran 10w-40 during the cold months of the year and 20w-50 during the hot months of the year and i got 193K miles of of my third gen then i decided to build it up. . .

Mike

 

Thanks for the suggestion, but it turned out to just be the oil pressure sensor. Put in a new one and everything is fine.

 

Very cool good to hear all is well . . .

Mike