The 2023 Chevrolet Tahoe is a big ol’ body-on-frame SUV that makes hauling things and people easy. But what sort of fuel economy can you expect in a rolling V-8 powered block? We tested the 6.2-liter 2023 Chevy Tahoe with the RST Performance Package on our 100-mile highway mpg loop.
Before we dive into the test results, let’s take a closer look at the Chevy Tahoe RST with the performance package. This particular model comes equipped with one of our favorite motors of all time, the 6.2-liter LS. The performance package includes a performance air intake and exhaust, which further enhances the driving dynamics of this SUV and bumps peak horsepower up to 433 hp. This is one mean family hauler.
Now, let’s talk about the purpose of this test. The EPA’s highway fuel economy test rates the 4WD Tahoe with the 6.2-liter engine at 18 mpg. However, this test is conducted at an average speed of only 48 mph, which may not accurately reflect real-world driving conditions. Many people use their SUVs for long road trips at higher speeds, so we wanted to find out what kind of fuel economy you can expect in those situations.
To conduct our test, we filled up the Tahoe with premium fuel, as recommended by the manufacturer for this particular model. We set the tire pressures to the recommended level of 35 PSI and set the climate control to 73 degrees Fahrenheit. With everything set, we hit the highway and set our cruise control to 71 mph, aiming for a realistic highway driving experience.
The Tahoe RST was pleasant on the highway, with a comfortable and smooth ride. The cabin layout was well designed, although we did find the seats to be a bit lacking in cushioning. The adaptive cruise control worked well, but the lane-keeping assist could be stronger.
After 100 miles of highway travel, we calculated 21 mpg for the high-performance Tahoe RST. This is 3 mpg better than EPA, and when you’re talking lower numbers like this, that’s a significant percentage! That’s just 1 mpg less than the Chevy Colorado Trail Boss we tested. We were happy to see the trip computer and the pump calculations agreeing, further verifying this impressive result. Factor in the 24-gallon fuel tank, and you should be able to squeeze 500 miles out of a tank at highway speeds.
Thank you for reading, and if you’d like to see the test in action, check out the video below.