Glenn,
My oil pressure does not have the drop that you mention. I use the same oil
you do. The difference may be in the engine. As the
thing heats up, tolerances become wider, oil galleries and bearings widen and
more oil flows causing the pressure to drop. How long
has it been since the engine was overhauled? This might be an omen of an
impending overhaul in your future.
Joe
Glenn wrote:
>
> Hi,
>
> Since I installed my oil pressure gauge I am amazed at how much the viscosity
>drops during highway driving especially on hot days. I am currently running
>Castrol GTX 20-50. After driving about 40 miles to work at about 65- 75 mph
>the oil pressure will drop to about 45 psi at speed and about 15 psi at idle.
>Around town the pressure drop is not as bad. Has anyone had better success
>with a different brand of oil. I don't have an oil cooler, but it's looking
>like I might need one.
>
> Thanks,
> Glenn
|