Home Forums Gear Hunting Trucks and Four-Wheel Drives why change oil once a year?

Ding ding... when it is super loaded. Ideally it should have a restriction gauge or filter minder telling you its at 25 in h20 restriction.

Most cars dont have them, but I assume military vehicles do. Off road equipment normally does.

I was hoping the military trained guy would tell us how the army does it and how he does it.

Changing air filters too early or too often lets more dust in the engine than running them really really dirty.