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http://www.youtube.com/watch?v=lPYkW25o-XQ So that's my little GM 3.1, knocking away. I've tried all sorts of oils, thicknesses, additives. Nothing worked. 'Till I tried a quart of Rislone stuff, and it pretty much made this dreaded noise go away. Even at startup, there was barely any hint of...

So I go over to my friend's house the other day and he had just done an oil change himself. He has a 4.5 quart sump, and what he usually does is he buys a gallon jug (4 quarts) and then a single quart bottle and dumps it all in. This time I asked him how much he paid for the gallon jug, and...

So I've had good luck with going with a slightly thicker oil in my GM 3.1 engine to quiet the noises, but I have a whole stash of 0-30 GC oil and would like to use that up before buying new oil. I know that the 30wt GC is actually closer to a 40wt, so that's good. But I just worry about the 0wt...

Can anyone explain the difference between a single grade HD (30/40) oil and a multigrade (15w40) oil. I'm looking for a better oil for my piston slap riddled car, and I have been advised to do an AutoRX cleaning and then apply a nice HD oil afterwards. I was looking at either the Rotella HD...

So I have a gm 3100 engine and it has a pretty bad knocking/ticking sound at cold starts. It get's worse under acceleration, and only get slightly better as the engine warms up. Now I've read all about piston slap and vavle noise, but this doesn't ever go away. Right now I'm running m1 10w40...