[77 Canamman]

Originally Posted by ta6point6

Good info I cant stand on one side or the other. I am just asking basic questions to help my 51 year old 350 engine keep running for as long as it can. I can see what you are saying about filtering the oil from smaller contaminants, makes sense. I basically have low oil pressure at idle when truck is at normal operating temperature. While driving around the truck is at about 40 psi so I guess I shouldnt say fluctuating oil pressure just low at idle. I was just watching some videos and see people pouring all kinds of things in oil and gas tanks like Seafoam, Berrymans and now the other nano particle additives. I know a good portion of this is probably wishful thinking and trying to attract youtube followers. My dad had let this truck sit for about 5 years before he gave it to me so I know there is some sludge built up in engine. I am eventually going to change pan gasket and probably oil pump. I probaly can not go with lighter oil like 5W-XX and do not want to go with motor honey because I have seen what happens to that in the winter(well -30 lol).

The only way an additive or detergents will improve a poor oil pressure condition is if the relief valve in the pump was hung up due to crud. Most likely the bearing clearances are wide due to wear, or the pump is weak, ort a combination of the two. Thicker oil will help slightly, but the only true way to correct is to overhaul the thing.