Quote:
Originally Posted by scottyb
2 stoke oil is mixed with gasoline to lubricate the internal moving parts of the engine. DO NOT RUN WITHOUT IT !
Non-detergent oil is used in a 4 stroke engine sump where it is slung or pumped to lubricate moving parts.
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And don't run a 4 stroke with non-detergent oil either. that detergent is needed to keep gunk from building up, it also helps stop foaming. No matter what your bearing clearance is, there is only a film of oil from 20 to 50 MILLIONTHS of an inch keeping you from metal to metal contact, you want that oil clean!
Tom