I have a '97 Escort wagon with a 5 speed, keeping it at about 50-55 mph in local driving I usually get about 32-34 MPH without any other special modifications. My best highway mileage has been driving with the c/c set at 55 MPH on a cool summer day when no a/c was needed and was riding with the windows down and got 49.85 MPG. This was with the original Goodyear tires on it that had about 1/4 of the tread life left on them. I've since put BF Goodrich 70K mile A/S radials on it and the mileage has dropped to around 40 MPG under the same conditions. I do have a K&N air filter which most people say don't help their mileage, but on my '97 I think it gave me 1-2 MPG increase. I just recently put new plugs in my '02 Escort and used Bosch platinum, I've heard mixed comments on the Bosch platinum in this engine, some say they last good others say they don't, but I use them in my '88 Escort with the 1.9L engine and they usually last 100-125K miles.
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