Pour zMAX Fuel Formula (12oz.) in the fuel system with at least 1/2 tank of gas or diesel fuel. Pour zMAX Engine Formula (12oz.) into your crankcase. Works with all engine oils (synthetic, multi-grade or mono-grade including diesels). zMAX does not replace your regular oil. zMAX will not overfill your normal oil level, because it soaks into metal. Start engine and bring to operating temperature after installation.

Recommended every 6 months or 6,000 miles, whichever comes first.

zMAX will not void the manufacturer's warranty that comes with your vehicle.