It may seem obvious, but fill the engine's crankcase with the right amount of oil, usually four to five quarts, and make sure the filter is full of oil. If you've purchased an assembled motor, check ...

The engine start procedure requires some practice! You will need to manage the throttle, mixture, magneto switch, and fuel pump, while monitoring parameters such as fuel flow, oil pressure, and RPM.

Heavy-duty pickups and long-haul trucks rely on torquey diesel engines that are more economical, reliable, durable, and have a more straightforward construction than a comparable unleaded gas engine.