I thought Griff said NO MORE OIL threads..........

I thought it was the guy from Iran ?

They maybe toast soon, glad the Pres didnt reach for the button

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.

You need to read the report from Mercury after they did a tear down on Teagues motors after a season of racing. No measurable wear after a full racing season running Amsoil.

Conventional Valvoline VR1 20W50.

Used it for years.

I switched to Mobil 1 15-50 & Mobil 1 Filters & I dont have the fluctuations with pressures & temps like I had with others...

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.

Could you explain this table
Thanks