About
TOP TIER™
TOP TIER™ Approved Fuels meet the high-quality fuel performance standards developed by some of the leading automotive and heavy-duty equipment manufacturers. TOP TIER™ provides benefits to consumers, retailers, and vehicle manufacturers by improving fuel quality to meet the increasing demands of evolving engine technology.
A Higher Fuel Standard
Is TOP TIER™ Better?
What is TOP TIER™ gasoline?
Automakers Recommend
Some of the leading automakers sponsor the TOP TIER™ Program and recommend its consistent use in vehicles to minimize carbon deposit build-up and keep engines operating as designed. The number of sponsors has grown over the years and now includes BMW, General Motors, Stellantis, Ford, Honda, Daimler Truck, Toyota, Volkswagen, Mercedes-Benz, Navistar and Audi.
Minimize Deposits
Deposits that form in engines and fuel delivery systems can cause performance issues such as reduced fuel economy, increased emissions and drivability problems such as hard starting, hesitation and stalling. TOP TIER™ Approved Gasolines use additives tested and shown to minimize deposits.
Emission System Protection
TOP TIER™ prohibits the use of organometallic additives that are known to damage emissions aftertreatment systems.
Today's Engine
Today’s diesel engines typically utilize high pressure common rail (HPCR) fuel injection systems that better regulate fuel pressure and injection timing for cleaner combustion. This technology also allows for implementation of catalyst emissions control devices like Diesel Oxidation Catalyst (DOC), Diesel Particulate Filter (DPF) systems and Selective Catalytic Reduction (SCR). These advancements have resulted in higher operating pressures and subsequently tighter tolerances for moving parts in fuel pumps and injectors, in turn driving the need for improved fuel quality.
Engine Manufacturers Recommend
The TOP TIER™ Approved Diesel Program is currently sponsored and overseen by General Motors, Volkswagen, Daimler Truck, Navistar and Ford – and recommended for both heavy and light-duty vehicles.
Better Performance
TOP TIER™ Approved Diesel was created to promote better fuel quality to maintain fuel economy, reduce maintenance costs, and reduce vehicle downtime. The performance standard is to be used in tandem with regional specifications or regulations. The TOP TIER™ Diesel Fuel Performance Standard requires additive packages to: 1) reduce internal and
external injector deposits, 2) improve lubricity to decrease wear on pumps and injectors, 3) improve fuel stability, and 4) reduce particulate and water contamination.
TOP TIER™ Fuel Standards keeping pace with evolving engine technologies
TOP TIER™ Fuel Standards keep injectors and valves clean
TOP TIER™ Fuel Standards are developed by many top auto manufacturers to improve engine performance.
OUR SPONSORS
Audi
BMW
Ford
GM
Honda
Daimler Truck
Mercedes-Benz
Navistar
Stellantis
Subaru of America
Toyota
VW