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Fuel Economy and Driving Range

Car and Driver logo Car and Driver 7/10/2018 Eric Stafford

Fuel Economy and Driving Range Rating: Fuel Economy and Driving Range© Car and Driver Fuel Economy and Driving Range

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Neither X6 powertrain is particularly efficient, although the six-cylinder we tested exceeded its EPA highway number, delivered similar real-world fuel economy to its rivals, and provides the longest range per tank.

The V-8–powered X6 is only available with all-wheel drive, but the six-cylinder model offers either rear- or all-wheel drive. The EPA estimates that they earn the same 18 mpg city, but the rear-drive model adds 1 mpg to its highway rating.

Fuel Economy Ratings Compared

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We’ve devised our own fuel-economy test in an attempt to replicate how most people drive on the highway. Our procedure entails a 200-mile out-and-back loop on Michigan’s I-94 highway. We maintain a GPS-verified 75 mph and use the cruise control as much as possible to mimic the way many drivers behave during long trips.

The X6 xDrive35i exceeded its EPA highway estimate on our fuel loop. Still, its observed 25 mpg was only 1 mpg more than the Audi and Maserati. Since we haven’t tested an X6 with the V-8, we don’t know how efficient it is in the real world.

Test Results: Highway Fuel Economy

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Test Results: Highway Range

a screenshot of a video game: Fuel Economy and Driving Range© Car and Driver Fuel Economy and Driving Range Fuel Economy and Driving Range: From city, highway, and combined EPA ratings to our own real-world fuel-economy test, see how the X6 performs versus the competition.© Provided by Hearst Communications, Inc From city, highway, and combined EPA ratings to our own real-world fuel-economy test, see how the X6 performs versus the competition.
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