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ENGINE OIL WHATS BEST?

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keiken01:
I live in Missouri and went with 5w30 because we get temps from the winter of -5 F to summer of 105 F.  If I drove it more, I'd change to 10w40 for summer driving.

Soaring:
Yeah 5W30 in sub-zero weather is a wise decision.  5W30 in 90 degree weather is dumb.   ;D

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