Originally Posted by panic
200 rpm + 0W20 oil = seized crank

Really ? I'm curious about this. If one were to run a very light viscosity oil, would more damage result because the engine is running less rpm, or would higher rpm cause more damage ?

I ask because I see where 10W is called for use in temps less than 32F, and even 5W for temps less than Zero F.

Of course we are not talking about a slow speed race in Fairbanks, Alaska, but it's not like the engine will be subjected to a lengthy time of operation. And wouldn't the oil pump have an easier time moving a lighter fluid, and maybe more of it, while operating so slowly ?


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