In this episode of Hennessey’s UNDER THE HOOD, we walk you step-by-step through how to change the oil on the RAM TRX, one of the most powerful and capable off-road trucks on the market. Whether you’re maintaining your stock TRX or just want to keep your performance machine running strong, regular oil changes are critical for engine longevity—especially when dealing with a supercharged V8 like this one. We cover everything from gathering the right tools and materials to safely lifting the truck, draining the old oil, swapping out the filter, and refilling with the proper type and amount of synthetic oil. You’ll also get key torque specs and tips to avoid common mistakes that can lead to oil leaks or performance issues. But this isn’t just any TRX—this beast has been transformed with the Hennessey MAMMOTH 1000 upgrade. That means over 1,000 horsepower from a tuned and supercharged 6.2L HEMI V8, paired with upgraded injectors, high-flow exhaust, a recalibrated ECU, and signature Hennessey exterior and interior touches. Keeping the oil fresh in a high-output engine like this is even more important, and we’ll highlight the differences in maintenance approach when you’re dealing with four-digit power figures. Stick around to hear the MAMMOTH roar to life after the service—because changing the oil is one thing, but hearing that engine fire up again is the real reward.