Double Your Gas Mileage 2X - The funniest videos clips are here Here are some great waus to start saving on your gas mileage... i was quite surprised on just how much this increased the MPG's ...check out this video and let me know if you are going to try some of these ways to save on gas and if they worked for you too would love to know how much your gas mileage increased and how much money you saved on your gas