Im at 138K + considering the larger tires I run its probably really over 145k . No engine problems , no codes , I do regular maintenance plus some extra because I wheel the shit out of this truck. I use mobile 1 that I get cheap at walmart , I change it myself every 3,000 miles or less. I use a TOYOTA OIL FILTER very important because we have an inverted oil filter on the V6 which requires a check valve to keep the filter full . Toyota filters have this valve. It can still hit the rev limiter like a boss but I usually don't do that. Every issue I've ever had was caused by my excessive abuse like deep mud , rock crawling and deep water crossings. Most issues so far have been with the front Lower control arms and wheel bearings. These trucks are so well built that I wouldn't think twice about repairing or replacing the engine or transmission if one did happen to fail. I may have the valves adjusted just for shits at some point.