Why TOP TIER™?
Currently, many gasoline retailers provide fuels with lower-quality additive packages that can build up deposits on fuel injectors and on intake valves.
Why TOP TIER™ Detergent Gasoline?

The intention of the TOP TIER™ Detergent Gasoline standards is to create a winning situation for gasoline retailers, auto manufacturers and drivers.   Currently, many gasoline retailers provide fuels with lower-quality additive packages that can build up deposits on fuel injectors and on intake valves.  Others can build up deposits in combustion chambers and may lead to intake valve sticking.  These lower levels of additives can have negative impacts on engine performance and vehicle responsiveness. 

Why TOP TIER™ Diesel Fuel?

TOP TIER™ Diesel Fuel was developed to provide better performance, in turn helping the diesel fuel retailers, auto and engine manufacturers, and particularly those who drive or use diesel-powered equipment.  Relative to the ASTM D975 and D7467 specifications for diesel and biodiesel blended fuel in the U.S., the TOP TIER™ Diesel Performance Standard requires detergents to reduce deposits on the fuel injectors (both internal and external), improve lubricity (less wear on injectors and in the engine), improve fuel stability (less deposits in the fuel system components), and provide more protection against water and particulates that may be in the fuel before you dispense it into your vehicle or equipment.