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Originally Posted by Thumperville
hey i was just wondering about the oil weights in relation to the different seasons. the guy at the local motorcycle shop handed me 20w50 and said thats what they use during summertime. any known problems going with this oil for our bikes?
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I don't deviate from the standard oil weight unless I notice a decline in performance of a vehicle. (knocking in summer or sluggish starting in winter.... yes, I work with a few older, looser engines.)
20w-50 seems like overkill to me, on a bike that the factory recommends 10w-40 on for all driving seasons. The thickest oil I run in a bike is a 15w-40 and that's on an abused China-bike.