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Its fine won't hurt anything. If your doing this to increase your mpg you need to be in warp neutral first then shift into N. Glide down the...
My varies from my calculated on paper mpg everytime. Sometimes higher sometimes lower. I always fill up at the same gas station. So its not that.
I've been running 65psi for awhile now. Higher before that but i cant take the really harsh ride. You can fill every flaw in the road.