CM2250 gear lube reccomendation

[Rawze]

(10-07-2017 )JMBT Wrote:  Rawze, what weight of Super tech for an aging CM 2250?

If you think there is copper on the overhead cam bearings (more then 600k miles typically) then perhaps a gallon of 85-140 at an oil change? - To put this into perspective, the equivelent average viscosity would be 112 grade for 85-140. The gallon of white bottle additive that they sell at the oil change places is 110-grade.

On a newer engine, I would think that adding some 80-90 or 75-90 (roughly 83-85 grade) would not be as intrusive on an engine with tight tolerances, but then again, I see people dumping in the 110 junk into their brand new low mile engines like fools in hopes to "extend its life" too.

My thoughts are that you only need to start raising viscosity only as things get more and more worn out.