My 22' Ram Limited, with 23,000 miles, runs great. Here are some mods I have done: S&B cold air intake, Flowmaster FX exhaust muffler kit, Resonator delete kit, oil catch can, a Pedal Commander accelerator module, and a Pulsar ECM tuner. The truck runs great with no issues. The Edge Pulsar tuner is new (last week) and I'm still getting used to it. It really woke up the horses and let them out. I'm running in performance mode with 93 octane. It's not a racing truck, but when I step on it, it goes. I do all my own work and am open to any questions you may have. I also installed a Security Gateway Module Bypass cable for the OBD2 access port so I can see what's going on with my truck.