i dont do anything special. i got my 4runner and just did a simple tune up, new plugs, wires, distributer, timing chain, and cleaned everything out. got a bottle of sea foam and ran through the tank then changed the oil and fuel filter. got new tires and have them totally full of air. i try not to take it over 2500 rpm just cuz i pay for my own gas"im still in high school with a part time job...me=broke" but sometimes i hot rod it, just to shake things out. dont really do anything special. i dont think this is the origanal motor that came with the truck. whatever it is im happy with it!