Tank on EmptyTank on Empty
 

It All Depends...

December 15, 2007 about Mercury Grand Marquis

Judging accurately how many miles you have left in the tank after that little yellow 'low fuel' light illuminates depends on one thing; city or highway!! If you're running straight down the PA Turnpike at a cruise-controlled 70 mph you can probably expect to make the rest stop that's still thirty-five miles east of you. If you're stuck in King of Prussia in the middle of the afternoon you better have a destination within fifteen to twenty miles in mind. Why? Fuel mileage drops by almost half when you take your Lux-O-Barge off the highway and start the stop-and-go shuffle at thirty-some miles an hour.

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March 9, 2011 by JP

The most fuel efficient speed is around 50 mph (approximately 80KM/H) I agree with the driving method though. Steady speed with minimum braking and acceleration. I did this on a remote gravel road; however, it ruined my suspension.

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