best oil to use
#11
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I thought Griff said NO MORE OIL threads..........![Band](/forums/images/smilies/band.gif)
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Last edited by F-2 Speedy; 06-24-2019 at 03:00 PM.
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Was running Castrol 20W50 until a fellow OSO guy recommended Brad Penn straight 50 (never start motor if I need a jacket). It is different, the 20W50 shows more psi then the straight 50 at idle and higher rpm.
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Alot of guys assume they need this or that based on bearing clearance. Oh, its a big block, well than it must need a straight 50. IMO, it has more to do with the temperatures youre operating in. I dont think ANYONE needs an engine oil that has 220 centistokes at 100* of oil temp. Of course theres the argument for viscosity modifiers shearing, and breaking down, etc.
Lets say you run 210* of oil temp running hard. Maybe the 15w50,20w50, 25w50 might be fine. Lets say your buddy only runs 150* oil temp in his engine. that 50 grade might be too viscous of an oil for him. a 40wt might be better. Then theres the guy who maybe runs 250* oil temp. He may want to run a 60wt.
Interestingly, the Amsoil straight 60 synthetic, is actually thinner cold, than a straight 50wt , and not much thicker than a 20w50 VR1. So one might say, that guy running straight 60 is a moron, and he's pumping syrup thru his engine, but that would be a bar room assumption.
Lets say you run 210* of oil temp running hard. Maybe the 15w50,20w50, 25w50 might be fine. Lets say your buddy only runs 150* oil temp in his engine. that 50 grade might be too viscous of an oil for him. a 40wt might be better. Then theres the guy who maybe runs 250* oil temp. He may want to run a 60wt.
Interestingly, the Amsoil straight 60 synthetic, is actually thinner cold, than a straight 50wt , and not much thicker than a 20w50 VR1. So one might say, that guy running straight 60 is a moron, and he's pumping syrup thru his engine, but that would be a bar room assumption.