Diesels, operating in extremely cold environments, face unique challenges. These challenges are met with diesel fuel additives.

When  temperatures drop, wax, naturally found in diesel fuel begins, to crystallize. When wax crystals form is known as the cloud point. These wax crystals eventually clog the fuel filter and starve the engine of fuel. This prevents the engine from starting or even stalling out. While low-quality fuels may form wax crystals in temperatures as warm as 40°F (4°C), most diesel fuels have a cloud point near 32°F (0°C). The point at which the crystals clog the fuel filter is known as the cold filter-plugging point (CFPP).


Using #1 diesel fuel is one solution to cold-weather diesel fuel problems. While #1 diesel fuel has an advantage in low-temperature operability, the energy content of #1 diesel fuel is about 95 percent that of #2 diesel fuel. This  results in reduced fuel economy, less horsepower, and increase cost at the pump.

AMSOIL Diesel Cold Flow

AMSOIL Diesel Cold Flow (ADD) lowers the CFPP by up to 40°F (22°C) in ULSD. It minimizes the need for blending standard #2 diesel fuel with #1 diesel fuel, helping to maintain fuel economy and keep engines functioning normally.

  • Lowers cold filter-plugging point (CFPP) by up to 40°F (22°C)
  • Enhances engine reliability in cold temperatures
  • Fights gelling in cold weather
  • Improves low-temperature startability
  • Prevents wax settling during storage
  • Inhibits fuel-filter icing
  • Safe for use in all diesel fuels, including biodiesel
  • Reduces downtime and maintenance costs
  • Alcohol-free

AMSOIL Diesel All-In-One AMSOIL Diesel

All-In-One (ADB) combines the superior detergency and improved lubricity of Diesel Injector Clean, excellent cold-flow and anti-gelling properties of Diesel Cold Flow and the increased horsepower and cetane of Diesel Cetane Boost, in one convenient package, providing the full potency and benefits of all three products at an affordable price.

What about untreated fuel that has already gelled?

AMSOIL Diesel Cold Flow must be added to diesel fuel before it reaches its cloud point. Diesel Cold Flow will not dissolve wax or liquefy diesel fuel once wax crystals have formed.

AMSOIL Diesel Recovery (fuel that has already gelled)

AMSOIL Diesel Recovery (DRC) quickly dissolves gelled fuel to allow the operator to continue driving with minimal downtime. It separates the molecular bonds of wax crystals that have agglomerated in diesel fuel, and it effectively thaws frozen fuel filters and reduces the need for a new filter. Have a bottle of Diesel Recovery on hand. It’s cheap insurance against being towed to a service station or getting stranded somewhere in subzero temperatures.


  • Quickly dissolves gelled fuel
  • Thaws frozen fuel filters
  • Performs well in ULSD, off-road & biodiesel
  • Alcohol-free
  • Non-corrosive


The Lower the Temperature, the better