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Originally Posted by oil pan 4
Yeah I'm shooting for about 10 to 12cSt at operating temperature.
Maybe the oil only ever gets up to 180f and a "16 weight" oil is fine, but I doubt it.
The OEMs want us to use 0w-20 or 0w-16 and whatever because it benefits them. That way they can post higher cafe numbers and have to sell less electric and hybrid cars and it lets them sell another car that much sooner.
Chances are the Prius oil temp get up to and runs at 200 to 230f and therefore an oil that ends with the number 30 is ideal.
Then go with a 0w, 5w or 10w depending on your winter conditions.
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Wouldn’t 0w help with all the starts and stops that a hybrid has? So 0w-30 would be ideal?
I’ve been running 0w-20 the life of my ioniq hybrid and switched to 5w-30 and the engine seems to run smoothers and almost feels like it has more horsepower and push. Perfect oil for highway but I’m a bit concerned about city driving in Portland area