Originally Posted By: Gravely20G
How can I find what the viscosity of Kohler Magnum 30 and Mobil 1 V Twin 20W-50 engine oil would be after 10, 20 and 50 hours run time?
Wow.. There's so many variables that could potentially effect it, you could never predict such a thing. You could send out a UOA every other day and your results will always vary. It totally depends on your specific usage, state of tune of the engine, ambient temps, fuel quality, air quality... the list goes on. Why would you sweat such a thing? Start with a quality oil, change it at a reasonable interval and don't think in between.
Joel