5w-20 vs 5w-30?

AWDthis

Member
:
2007 MazdaSpeed 3
I was wondering what the difference was because mistakenly i put 5w-20 on my motor and then read the manual(hand)
 
ha i wouldnt' go 5000 miles on that, i would change at like 2500 or 3000. with direct injection there is a lot of sheering by the fuel, usually after 5000 miles a 5w30 is more like a 5w20.
 
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