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I see a number of posts with folks discussing the oil they use but no real discussions of why. From the Smart manual, it can be a little discerning for some of us (me) to understand the table in the manual. In any case, I changing my oil this weekend and since winter is approaching for us here in Michigan, I'm going with a 0w40 oil from Mobile One. During the warmer months, I plan to use a 5w40 Mobile One oil.
The reason I am choosing these is my understanding on oil ratings. The "w" means the oil is winterized meaning it stays viscous over a wide temperature range.
The number after the w is the temperature where the oil most viscous (thicker) when hot. Meaning a "w40" oil will be slightly more viscous (thicker) than a "w30" weight oil given a set high temperature.
The number before the w is the temperature where the oil is least viscous (thinner) when cold. Meaning a "0w" oil will be flow better than a "5w" oil. For Michigan winters, I think this is the better choice.
For the warmer months, I was contemplating a 5w40 oil which is what I believe is in it now since it was a Florida car.
Thoughts?
The reason I am choosing these is my understanding on oil ratings. The "w" means the oil is winterized meaning it stays viscous over a wide temperature range.
The number after the w is the temperature where the oil most viscous (thicker) when hot. Meaning a "w40" oil will be slightly more viscous (thicker) than a "w30" weight oil given a set high temperature.
The number before the w is the temperature where the oil is least viscous (thinner) when cold. Meaning a "0w" oil will be flow better than a "5w" oil. For Michigan winters, I think this is the better choice.
For the warmer months, I was contemplating a 5w40 oil which is what I believe is in it now since it was a Florida car.
Thoughts?