I read this gem at another forum, regarding 0W-20 oil:
"I would look in your owner's manual and see if it's acceptable to run 5w20 or 5w30 in your climate/temperature range. I HATE zero weight. that means that at 212*f, your engine oil has the same viscosity as WATER!!! 5w-20 has 5x the viscosity of water at 212*f which is still rather thin, without effecting the cold weight, which is 20x viscosity of water at 32*f."
"I would look in your owner's manual and see if it's acceptable to run 5w20 or 5w30 in your climate/temperature range. I HATE zero weight. that means that at 212*f, your engine oil has the same viscosity as WATER!!! 5w-20 has 5x the viscosity of water at 212*f which is still rather thin, without effecting the cold weight, which is 20x viscosity of water at 32*f."
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