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I hadn't gone 300 miles once on an all freeway trip and the low fuel light came on and I thought WTF. Time to go to the shop. Then I looked down and I had been driving with the gearshift to the left in 4 the whole time instead of over to the right in D. Made a huge difference in gas mileage. Usually If I set the cruise at 70 I can just hit 500 miles when the low fuel light comes on.It usually takes about 18.5 gallons then to fill up to the top.
so whats better? to keep the gear on 4th on highways or to keep it on D?
what about city driving below 50M/H?