Quote:
Originally Posted by Mr_BA2003
^^^ Excellent! That's what I was trying to say. The operating temp of the engine should stay the same.
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If you look in the owners manual it will actually show you on a chart what oil grades to use for which temperatures......So Northern states are generally hotter so require thicker oil......Southern states are much colder so thinner oils are fine.
Synth oils in thin grades can do the same work as thicker grade mineral oils because they are so well engineered.