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Grant311

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  1. Hello...I bought a used 07 RX400H in February 2011 with 49K miles on it. I live in the chicago area so it was quite cold then. I was shocked at the time to learn I only got about 21-22 MPG and thats driving like an old lady, playing the "drive on battery only" game, and a lot of coasting. I also have a 5 miles work commute, so by the time I got to work, the engine was still cold. As June and July warmed up, MPG improved a lot. I average around 25-27 MPG now. Once I drove about an hour away after a fill-up with highway/rural driving and averaged 34MPG for that one trip - but that was the best I ever got. I also got lucky with the green lights, and coasting and no a/c on. I usually fill-up with 89 octane, have michellin tires and have a K&N air filter which is suppose to increase horsepower and fuel economy and it will last the lifetime of the vehicle. I also heard a good wax on the car will increase fuel economy by up to 7% on an average car, but who knows.
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