The short answer: Nope. The reason: The common understanding is that going faster burns more fuel and therefore, the slower you drive, the less fuel your car will use, but this actually isn't true. ... Any slower, and your transmission will automatically shift to a lower gear, which requires more fuel to maintain.

How much gas can you save by driving slower?

Slow Down and Drive Conservatively

For light-duty vehicles, for example, every 5 mph you drive over 50 mph is like paying $0.18 more per gallon of gas (based on the price of gas at $2.63 per gallon). Reducing your speed by 5 to 10 mph can improve fuel economy by 7%–14%.

What is the best speed to conserve gas?

For the best gas mileage, you should keep it below 55 miles per hour. Reality: Fuel efficiency doesn't really start to drop until you reach speeds higher than 60. And how smoothly you drive makes much more of a difference on gas mileage than how fast.