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Cruising at 90-110+mph certainly brought down the gas mileage in my dads car. He used to get decent mileage on high speed trips, but some wider and better tires allow the speeds to increase, and the gas mileage dropped.
The best gas mileage I ever got in my 240 was on a 2 hour trip in which was going 75-90+ for a large part of the time (trying to keep up with the faster cars that I was following as my directions). I got just over 25mpg. I don't do much highway driving, so my mileage stays in the 21-23mpg range around town.
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Michael -- 1987 244 GT | Volvo 240 Links
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