I believe that the sticky thick STP and mineral concoction is to ensure that the parts all have lubrication in place for the initial startup. After it is run the regular oil will be dispersed throughout the engine. The STP will be diluted and removed at the first oil change.
If I was to guess, I would guess that the ideal aviation oil would be: 5 qts of Phillips XC with 1/2 pt of Camguard, 1 pt of kerosene or Stoddard solvent, and 1/4 pt of motor honey. I would say 90 weight gear lube, but that has sulfur in it, which could be a mistake.
The kerosene to scavenge carbon deposits, and the motor honey to coat the cam. Thoughts?
Do they have pressure oil systems or are they splash systems?Forget all these comparisons with water cooled auto engines, I think I'll just ask what was used in thousands of 1950-60s & 70s air cooled Harley engines, seems they run forever with little or no cooling while negotiating in the city, ample bearing clearances & about the same operating rpm :roll:
Forget all these comparisons with water cooled auto engines, I think I'll just ask what was used in thousands of 1950-60s & 70s air cooled Harley engines, seems they run forever with little or no cooling while negotiating in the city, ample bearing clearances & about the same operating rpm :roll: