* Continuous blue smoke under load points to the oil control rings.
* Intermittent smoke would point to the valve guide seals.
* Piston rings can 'stick' or wear out ( some ignoramuses will buy cheap, non-detergent motor oil at the Dollar Store, thinking that they're beating the system, only to find out that all the piston rings seize in their lands, and bye-bye engine! )
* 'Wet' and 'dry' compression testing can usually isolate the culprit.
* Running a higher viscosity motor oil, attempting to 'seal' an engine actually exacerbates the situation:
A) Shearing and churning forces increase immediately, which causes the engine to run hotter.
B) Running hotter ( or at a higher unit load ) causes oil to thin, even thinner than a thinner oil! ( flat -tappet cam-lobe failure comes first on the list ).
--------------------------------------------------------------------------------------
My 'TOYOTA' engine is at 447,000-miles, and runs like new. Those conspiratorial Toyoda Power Loom engine designers must have been dyslexic, accidentally 'increasing' the engine's lifespan, instead of 'shortening' it.
--------------------------------------------------------------------------------------
Dr. Ali Erdemir rated his 'boric acid oil' upper temperature threshold at 170-C, which is curious, considering that the oil surrounding an exhaust valve stem can experience 875-C ( a discrepancy of 514% ).
Dr. Erdemir's maximum 'speed' was 0.18 meters per second, while a typical automotive engines pistons experiences up to 25 meters per second ( a discrepancy of 13,000% ).
Perhaps physics behaves differently, depending on which type of diploma is hanging on the wall.
