thicker oil,less flow?

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18,449
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East of IGO
Depends upon the oils temperature at the time .All things equal probably but unless at extremes it is probably not worth thinking about.
 
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11,828
Location
PA
 Originally Posted By: oilchangeguy
Does thinner oil (5w20) flow better thru the filter than 5w30?
Thinner oil will flow through anything faster. ;\)
 
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4,844
Location
Saskatchewan
There will be less resistance to flow with a thinner oil, but the same amount of oil will flow through the filter media unless the restriction is high enough to open the filter bypass. Since they both carry the same winter rating, I doubt the difference would ever be significant.
 
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39,806
Location
Pottstown, PA
Thinner oil will flow easier through your filter. It will also flow easier through your engine. This may mean that more of it may flow through your engine.
 
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