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Power Strokes
6.7 Tech
Oil preference?
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[QUOTE="CATDiezel, post: 1142660, member: 4387"] 5w30 would be optimal for the 6.7l in the winter for the northern folks. But 10w 30 would still function pretty well. Remember it's still a 30 weight oil. The viscosity index improver is just that. An improver for colder temperatures to have a thinner viscosity at startup. I'm not sure why they keep the knowledge of oil and how it works such a secret but they certainly do. Nobody has a clue what they are buying half of the time. Or the fact that modern engines and oils need to be run at higher temperatures for the sake of the engine with tighter tolerances and higher heat loads with more thermal growth. I don't care what performance company says you need cool oil. They are FLAT WRONG. optimal oil temperature ideally would be 212*F. There may be .5% of people that need additional oil cooling capabilities on there trucks due to extreme sled pulling or drag racing at very high horsepower. [/QUOTE]
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