Rearend oil weights and MPG

72Dart6pack said

Wow. This question is right up there with does a waxed car get better mileage also? Good luck on your quest for a answer.

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I mean it's just a question, squeeze a bottle with thick oil see how much force you have to use to get it out then do the same with thin oil and see how easy it is. My usual driving trips are 10-15 miles around town.