Fuel for 81 vette

[Kiwidoc]

After getting the oil and filter changed in my 81 corvette I note that the oil pressure is 60 on start up and up to 80+ when running. I asked the mechanic what oil he used and it was synthetic 15W40. Could this cause my oil pressure problem or do I need to look further.

 

[Vettehead Mikey]

What was the pressure before the change? Pressure that high might be caused by an inaccurate gauge or some previous owner having erroneously installing a high pressure pump.

BTW- using synthetic oil is a waste of money unless the extended change interval is taken advantage of.

 

[GTR1999]

I have the same psi with my rebuilt 350 using Rotella 15w40. Mechanical oil guage is dead on as well.

 

[Hib Halverson]

After getting the oil and filter changed in my 81 corvette I note that the oil pressure is 60 on start up and up to 80+ when running. I asked the mechanic what oil he used and it was synthetic 15W40. Could this cause my oil pressure problem or do I need to look further.

First thing I'd do is make sure your oil pressure sender and gauge are accurate.

What is the oil pressure, once the engine warms up?