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.

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TOP TIER™ can reduce sticking valves, fouled plugs, valve damage and more

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Regular use of TOP TIER™ helps prevent the loss of critical fuel economy

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TOP TIER™  cleans existing engine deposits after just a few tanks

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.


Daimler Truck

Subaru of America

TOP TIER™ Request to Purchase Decals

Fill out this form to obtain the information necessary for purchasing TOP TIER™ decals.

Center for Quality Assurance
Attn: TOP TIER Licensing Program | 4800 James Savage Road | Midland, MI 48642 USA

Becoming a TOP TIER™ Licensee

Fill out this form to obtain the information necessary for becoming a TOP TIER™ Licensee.
For TOP TIER™ Approved Diesel qualification, provide information on use of 10 micron (absolute) filters for low-flow dispenser pumps and 30 micron (or less) filters for high-flow dispenser pumps.

Center for Quality Assurance
Attn: TOP TIER Licensing Program | 4800 James Savage Road | Midland, MI 48642 USA