TOP TIER™ Approved Diesel Brands
Due to the complexity of the diesel supply chain and logistics, not all stations of the same brand are TOP TIER™ Approved Diesel. To ensure you are purchasing TOP TIER™ Approved Diesel, consult the TOP TIER Station Finder or watch for the TOP TIER™ Approved Diesel sticker on the pumps.
| Brand | Country |
|---|---|
| Co-op | Canada - select locations only |
| Costco Wholesale | Canada - select locations only |
| Costco Wholesale | USA - select locations only |
| Kirkland Signature | Canada - select locations only |
| Kirkland Signature | USA - select locations only |
| Neste MY Renewable Diesel | USA, Canada |
Today's Engine
Engine Manufacturers Recommend
Better Performance
Better Performance
Engine Manufacturers Recommend
Today's Engine
Engine Manufacturers Recommend
The TOP TIER™ Diesel Fuel 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
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 emissions control devices like Diesel Oxidation Catalyst (DOC), Diesel Particulate Filter (DPF) systems and Selective Catalytic Reduction (SCR).
Today's Engine
In addition to the requirements of ASTM D975 and D7467 specifications for diesel and biodiesel blended fuel in the U.S., the TOP TIER™ Diesel Performance Standard requires additive packages and good housekeeping practices to:
- reduces deposits on injectors and other fuel system components
- improve lubricity decreasing wear on injectors and engine components
- improve fuel stability
- provide increased protection against water and particulates introduced into the fuel storage and dispensing equipment from entering the vehicle fuel delivery system.
Housekeeping
Water is the most common type of contamination in diesel fuel and if introduced into the vehicle fuel system can lead to corrosion, increased metal wear, ice during cold weather, plugged filters or screens, increased fuel degradation and microbial growth. TOP TIER™ Diesel Fuel suppliers take measures to protect against water in their fuel storage and dispensing equipment and must have a TOP TIER™ approved water detection process in place.
Additionally, TOP TIER™ Diesel Fuel marketers must have filters on their dispensing equipment as the last point of protection against contaminants entering the vehicle fuel system, regardless of the source of the contaminant.
Retailers Join the Program
Fuel marketers and retailers voluntarily join the TOP TIER™ program and agree to supply fuel meeting the Performance Standard using TOP TIER™ approved additives at a specified concentration.
Unlike the TOP TIER™ Detergent Gasoline program, the Diesel program is site specific, meaning some stations selling a given brand may offer TOP TIER™ Diesel while others may not.
Retailers Join the Program
Housekeeping
Retailers Join the Program
The Goal
Water is the most common type of contamination in diesel fuel and if introduced into the vehicle fuel system can lead to corrosion, increased metal wear, ice during cold weather, plugged filters or screens, increased fuel degradation and microbial growth. TOP TIER™ Diesel Fuel suppliers take measures to protect against water in their fuel storage and dispensing equipment and must have a TOP TIER approved water detection process in place.
Additionally, TOP TIER™ Diesel Fuel marketers must have filters on their dispensing equipment as the last point of protection against contaminants entering the vehicle fuel system, regardless of the source of the contaminant.
Fuel marketers and retailers voluntarily join the TOP TIER™ program and agree to supply fuel meeting the Performance Standard using TOP TIER™ approved additives at a specified concentration.
Unlike the TOP TIER™ Detergent Gasoline program, the Diesel program is site specific, meaning some stations selling a given brand may offer TOP TIER™ Diesel while others may not.
Light and heavy-duty vehicle manufacturers develop performance requirements based on evolving engine technology, fuel marketers and retailers choose to enroll and be recognized as a supplier of fuel meeting the TOP TIER™ requirements.
Working together to improve customer satisfaction!
A Higher Fuel Standard
Is TOP TIER™ Better?
What is TOP TIER™ gasoline?
