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My gas mileage drops off considerably the more over 70mph I drive, so now I keep it to 70. It seems that the diff between 65 & 70 is small, but 70 & 75 is large.
I only overinflate by 1-2 PSI. I agree that way overinflating is a bad idea, but do check to make sure you don't underinflate.
No thanks to tailgaiting behind trucks, the risk isn't worth it. I hate when someone rides on my bumper, I doubt truckers like it much better.
I've always tried to do things like coast into red lights, hoping to catch it green before I come to a complete stop.
The #1 thing is to just drive less. Try to group multiple errands, make sure errands get done right and I don't have to go back for one more thing, walk where I can, etc.
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