Fuel Economy of the 2020 Jeep Grand Cherokee SRT: Embrace the Thirst

15 MPG combined. Nobody buys a 2020 Jeep Grand Cherokee SRT for its fuel efficiency. This is a snarling, V8-powered performance machine draped in Jeep clothing, and the gas mileage is simply part of the deal. It’s the price you pay for thrilling acceleration and a soundtrack that would make lesser SUVs cower. Buyers of this vehicle want raw power and a visceral driving experience above all else. They’re enthusiasts, those who frequent track days, or simply drivers who crave something more than the average crossover. They understand and accept that frequent trips to the gas station are necessary.

City and highway performance

The EPA numbers for the Grand Cherokee SRT break down to 13 MPG in the city and 19 MPG on the highway. The city figure is telling; this isn’t a vehicle that enjoys stop-and-go traffic, and the massive 6.4L engine constantly fighting against inertia will quickly drain the fuel tank. The highway number is a bit more palatable, and a long road trip at a steady speed will yield closer to that figure, but aggressive driving will still decimate your MPG. The 8-speed automatic transmission helps squeeze out every last ounce of efficiency by shifting smoothly and keeping the engine in a relatively efficient range when cruising.

Annual Fuel Cost

Prepare yourself for an annual fuel bill of approximately $3,850, according to the EPA. This is based on driving 15,000 miles per year, with 55% of those miles driven in the city and 45% on the highway, using national average fuel prices. $3,850 is just an estimate, and your actual fuel costs could be higher or lower depending on your driving habits and local fuel prices. If you drive aggressively or live in an area with high gas prices, expect that number to climb considerably.

Real-world expectations

Do not expect to consistently achieve the EPA’s numbers. Real-world driving rarely mirrors the controlled conditions of the EPA testing lab. If you enjoy the sound and sensation of the SRT’s power, as most owners do, you’ll likely see fuel economy numbers even lower than the official ratings. Towing, hauling cargo, aggressive acceleration, and even just the simple joy of hearing that V8 roar will all decrease fuel efficiency. Drivers who push the SRT often see average fuel economy in the single digits.

How it compares

The 2020 Jeep Grand Cherokee SRT isn’t competing with fuel-sipping crossovers. Its rivals are other performance SUVs like the Land Rover Range Rover Sport Supercharged (17 MPG combined) or the BMW X5 M (16 MPG combined). Even within the Grand Cherokee lineup, the more powerful Trackhawk model results in similar fuel economy. The comparison to these vehicles isn’t about saving money at the pump, but demonstrating the Grand Cherokee SRT offers comparable performance and capabilities, with similar running costs. If lower fuel consumption is a primary concern, exploring all Jeep fuel economy data or researching the GRAND MPG across all years is advisable.

Tips to maximize efficiency

Resist the urge to constantly demonstrate the SRT’s acceleration because every hard launch and full-throttle run significantly impacts fuel consumption. A more relaxed driving style will make a noticeable difference, requiring restraint.

Consider using the Eco mode. While it may dampen the throttle response and shift points, it can improve fuel economy during everyday driving. It’s a good compromise for those moments when you don’t need to unleash the full fury of the V8.

Ensure your tires are properly inflated. Underinflated tires increase rolling resistance, reducing fuel efficiency. Check your tire pressure regularly and inflate them to the recommended levels.

Minimize idling. Letting the engine idle for extended periods wastes fuel. If you’re stopped for more than a minute, it’s generally more efficient to turn off the engine and restart it when you’re ready to go. This is especially true for a large-displacement engine like the SRT’s 6.4L V8.