[edhd58]

Here is my response. Fresh major rebuild of a 226 G 6 cylinder flattie, less than 10 hours. running 10w30, sitting idling in my drive while I wash the car. At some point I get in to move it and see NO oil pressure. I have no idea how long it ran that way. Motor now has just a slight rattle it didn't have before. Changed oil and went to 20w50 just to see if that would help as I was told 10w40 was too thin for the type oil pump I had. Nothing helped. I finally took the engine back apart, had the oil pump machined to get the clearances tighter and now run straight 30w. NO problems since. was it the oil pump or the oil I do not know. I was told by a guy that knows that style oil pump NEVER run less than 30w in the G series 6 cylinder because of that style oil pump. I was told by the same guy that once the film in the pump disappeared because of thin oil it would not pick up oil again until I primed the pump, because it hangs above the oil not submerged in it.