Quote:
Originally Posted by TheSnakeJake
both 5w30 oil and 10w30 oil will be a 30 weight viscosity when at high operating temperature. the first number in the designation is the cold temperature viscosity rating...
therefore a 5w30 oil is better for colder climates because it has less viscosity (flows easier) at cold temperatures.
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You are correct! The 5 represents viscosity properties of the oil :-). Forgive me, I have been in the hospital for two days, without sleep, with my newborn.
Thanks for the correction!