Whether your engine runs daily or only when you need it, zMAX Micro-lubricant® is the force against carbon build-up that can cause blow-by, loss of compression, excessive oil usage and high emissions. Carbon is like sandpaper rubbing on internal parts or debris build-up in a sliding door jamb. Combustion causes carbon and other harmful deposits to build up in your engine, fuel system and Transmission. When those carbon deposits settle into the internal parts of your vehicle, friction and wear become damaging and can cause.