I have a 1991 GMC Sierra K2500 that suffers from low oil pressure to the point that the "check gauges" light flickers on when the engine is hot and A/C is running.
The engine is otherwise running very smoothly, pulls strongly and never makes any bad noises. Oil burn is moderate less than 1 qt per 2,500 miles.
I have another thread to discuss diagnostic and repair, but this thread is mainly to seek feedback on oil.
I am going to try a 20W50 to see what it does for oil pressure readings. The local parts store has a pretty good price on Lucas Oil 20W50. Is it any good, or shoul I stay away from it?
The engine is otherwise running very smoothly, pulls strongly and never makes any bad noises. Oil burn is moderate less than 1 qt per 2,500 miles.
I have another thread to discuss diagnostic and repair, but this thread is mainly to seek feedback on oil.
I am going to try a 20W50 to see what it does for oil pressure readings. The local parts store has a pretty good price on Lucas Oil 20W50. Is it any good, or shoul I stay away from it?