Using 10w/30 alright?
Originally Posted by johnlotusboy
I do NOT recommend 10/40w read up on it, most manufactures and racing say the spread of 10/40w takes too many modifiers to achieve this rating and the modifiers break down quickly. I run 10/30w, 5/30w is fine too.
porsche come out of the factory with 0w40 mobil1
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