I would like to know the car he is driving! 20% sounds a little too good for the first tank treated with MotorBooster....but then I am the first to question people who tell me of how much better mileage they get with different brands of fuel. I have never seen a big difference trying other fuels. My big concern is whether drivers are doing accurate testing. First and biggest factor is doing the same type driving throughout the test. If I drive throught the hills of PA one tank and then take a trip the next.....there will be a huge difference! Also making sure one fills the tank up the same every time.
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