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Fuel Saving Tips

Fuel economy misconceptions- Optimal speed for MPG

Ideal MPG speed is definitely 70-80 mph: Nope The only reason you are getting reasonable mileage at 80 mph is because you are ONE car length behind the guy in front of you, that’s it. I see it all the time, don’t try to deny it. Speed vs mpg charts for cars generally show best mpg between 30-45 mph. A semi or RV may achieve best mpg at 55 mph, but don’t expect cars to do the same. Below the ideal speed range you are losing mpg due to reduced engine efficiency, above the ideal speed range, you are losing mpg due to rapidly increasing air drag.

posted by Daschicken on March 15, 2017

this tip works for 62% of voting Fuelly members.

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