- Dec 18, 2006
I never understood the "higher MPG claim" that 0w30 make, saying improved mileage over 5w30. At operating temps, they are both a 30 weight and that is where a very large percentage of the average drivers time is spent, at operating temps. Sure, startups are easier with a 0w, and those initial few minutes could result in better MPG, but for someone like me who lives in San Diego, my car is fully warmed within 4 blocks of "startup" driving. Can a 0w raise MPG in a way that the change can actually be measured? Or does it raise your MPG from 36 to 36.2, for example? Cheers!