Originally Posted By: Geoff
Thinner is generally better for cold and hot oil flow. Its more about what kind of sustained oil temps you see in your driving.
My opinion GF5 gets you to a sustained 210F oil temp. Higher than that, use an ACEA c3 (European standard) xw-30 or an xw-40. This applies to most engines these days. C3, with its higher HTHS, covers you to around 240-250F, not uncommon when using an engine near or at its maximum output over 100mph
Sustained oil temps above 210F are unlikely in US driving under 80 mph (even in the summer).
right on. aren't the GF5 broken down into those with or w/o ILSAC or something like that?
Thinner is generally better for cold and hot oil flow. Its more about what kind of sustained oil temps you see in your driving.
My opinion GF5 gets you to a sustained 210F oil temp. Higher than that, use an ACEA c3 (European standard) xw-30 or an xw-40. This applies to most engines these days. C3, with its higher HTHS, covers you to around 240-250F, not uncommon when using an engine near or at its maximum output over 100mph
Sustained oil temps above 210F are unlikely in US driving under 80 mph (even in the summer).
right on. aren't the GF5 broken down into those with or w/o ILSAC or something like that?
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