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Old 04-05-2015, 05:22 PM   #1 (permalink)
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Grandpa's Caprice (retired) - '84 Chevrolet Caprice Classic
Last 3: 20.76 mpg (US)

Woody - '90 Mercury Grand Marquis Wagon LS
Last 3: 19.57 mpg (US)

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Last 3: 12.94 mpg (US)

Mom's Car - '01 Chevrolet Impala Base
90 day: 21.95 mpg (US)

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Oil Viscosity Question - 10w30 vs 5w30 and 0w30

I'm aware that if the oil is a Xw30 it's compatible with the engine. But, it'll cause more wear to have a 10w30 than 5w30 or 0w30 in theory - If the car engine can take it and not leak or burn oil, is there any reason to not use 0w30? I imagine it would make starts - Summer or winter - easier and get to lubricating the system quicker.


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