The 2018 GMC Yukon C1500 XL 2WD with the 6.2L V8 gets 17 MPG combined. Nobody buys this extended-length Yukon expecting Prius-like efficiency. They buy it because they need to haul eight passengers and their luggage across state lines, or tow a boat to the lake every weekend. Fuel economy is a secondary concern, a necessary evil tolerated for the sheer capability and space only a full-size SUV can provide.

City and highway performance

The EPA estimates the Yukon XL with the 6.2L V8 will achieve 14 MPG within city limits. This reflects stop-and-go traffic, idling at lights, and the constant demands placed on the engine to move this nearly three-ton vehicle. On the open highway, the number jumps to 23 MPG. The 10-speed automatic transmission helps here, keeping the engine in its optimal power band at cruising speed. However, even with cylinder deactivation technology switching to V4 mode when possible, aerodynamic drag takes its toll, especially at higher speeds. Don’t expect to match that 23 MPG if you’re consistently driving 80+ mph.

Annual fuel cost

According to the EPA, the estimated annual fuel cost for the 2018 GMC Yukon C1500 XL 2WD with the 6.2L V8 is $3,400. This calculation is based on driving 15,000 miles per year, assuming a national average fuel price. Remember that fuel prices fluctuate greatly, so your actual cost could be significantly higher or lower depending on where you live and how aggressively you drive. If you regularly tow or spend significant time in heavy traffic, budget accordingly.

Real-world expectations

While the EPA provides a standardized benchmark, real-world MPG can vary considerably. Expect lower MPG if you frequently engage the Yukon XL’s strong towing capabilities. Headwinds, mountainous terrain, and aggressive driving habits will also negatively impact fuel consumption. Conversely, gentle acceleration, consistent highway speeds, and diligent maintenance can help you get closer to the EPA estimates. Owners report a range of experiences, but most acknowledge that achieving the advertised 23 MPG on the highway requires conscious effort and a light foot.

How it compares

The 2018 Ford Expedition Max with its 3.5L EcoBoost V6, a direct competitor, manages around 19 MPG combined. While that’s a noticeable improvement, it comes with a different driving experience. The Chevrolet Suburban, mechanically similar to the Yukon XL, offers almost identical fuel economy figures in its equivalent 6.2L V8 configuration. It’s important to consider that the Yukon XL buyer isn’t just looking for the most efficient option. They are often prioritizing features like the Denali trim’s unique styling, upgraded interior, or the specific towing capacity afforded by the 6.2L engine. For those less concerned about max towing, the 5.3L V8 powered YUKON MPG across all years might offer a slight advantage.

Tips to maximize efficiency

Avoid aggressive acceleration. The 6.2L possesses ample power, but rapid acceleration burns fuel quickly. Smooth and steady increases in speed will improve your MPG substantially.

Maintain proper tire inflation. Underinflated tires increase rolling resistance, forcing the engine to work harder. Check your tire pressure regularly and inflate to the recommended level found on the driver’s side doorjamb.

Minimize idling. The 6.2L engine consumes a surprising amount of fuel at idle. If you anticipate being stationary for more than a minute or two, turn off the engine.

Use cruise control on the highway. Maintaining a consistent speed helps to optimize fuel efficiency. However, be mindful of terrain changes and adjust your speed accordingly to avoid excessive downshifting.

Reduce unnecessary weight. Carrying excessive cargo adds to the vehicle’s overall weight, impacting fuel economy. Remove any items you don’t need on a regular basis. For more information about GMC and all Gmc fuel economy data, check out our other articles.