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I get 43 mpg exclusively on the highway, doing about 80-85% hwy driving. If you can drive 40-55, you'll probably get even better. //////////// Excellent conditions will give over 40mpg. Like you have have also gotten 43mpg & over the last 5 tanks, to average 38mpg. But mediocre conditions will knock Elantra mpg down quickly. I traveled about 30miles at 25-58mph, with fairly few stoplights & lesser traffic. The trip computer stated 51mpg over that period. However, the same tank, giving 400+miles of driving with more traffic, stoplights, hills & cool-downs, caused that tank of gas to get 40mpg, calculated. Even worse conditions, would see Elantra mpg descend greatly, also.Report it
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