Outperforms EPA Highway Rating on Road Trip - 2015 Dodge Viper GT Long-Term Road Test

2015 Dodge Viper GT Long-Term Road Test

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2015 Dodge Viper GT: Outperforms EPA Highway Rating on Road Trip

July 15, 2015

2015 Dodge Viper GT

Last time we discussed the fuel economy of the 2015 Dodge Viper, we had fewer than 1,000 miles on the odo, and most of those miles were from shuffling around the west side of Los Angeles.

But then I took it on a road trip. 700-plus miles, no traffic, minimal stopping. Plenty of gas stations, so no need to be conservative with the go pedal.

Where we were:

Worst Fill MPG: 8.1
Best Fill MPG: 11.3
Average Lifetime MPG: 9.9
EPA MPG Rating: 15 Combined (12 city/21 highway)
Best Range: 138.2 miles 
Current Odometer: 670

My week with the car:

Worst Fill MPG: 7.0 (my commute is not kind to V10s)
Best Fill MPG: 23.8
Average MPG: 16.6
EPA MPG Rating: 15 Combined (12 city/21 highway)
Best Range: 294.3 miles 
Current Odometer: 1,680

Adding them all together:

Worst Fill MPG: 7.0
Best Fill MPG: 23.8
Average Lifetime MPG: 13.3
EPA MPG Rating: 15 Combined (12 city/21 highway)
Best Range: 294.3 miles 
Current Odometer: 1,680

That 23.8 mpg tank was a short drive, only about 90 miles. I misjudged my coffee timing, had to pee and realized I forgot to check the oil at the first stop. Figured I'd get gas, too. I backed up this tank with a 22.6 mpg tank from Vegas to LA. I wasn't nursing it, but I wasn't in any danger of getting pulled over for speeding, either.

As for other fluids, the Viper took a half-quart of 0W-40. The manual says it may use some oil during break-in, so a half quart over 1,600 miles seems fine.

Mike Magrath, Features Editor @ 1,680 miles

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