It’s not about speed
Allen Best is a real dreamer if he thinks wishing will get people to drive 65 mph on highways designed to be safely negotiated at 80 mph (“Slow down ” to save both fuel and money,” Dec. 30). Drivers go faster than that on roads designed for 40 mph. Ninety percent of drivers ignored the 55 mph when it was the law.
Speed seems to have little influence on the mileage for my Jeep Grand Cherokee with a Hemi engine. On a 2,000-mile trip to California and back, I carefully monitored gas consumption using the built-in sensor, and found the major influences were grade and wind.
My advice if you want the best mileage is: Don’t climb hills or drive when the wind is in your face.
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