Start with the condition of your fuel, then choose the protection and care you want. Answer up to three questions to see a matching treatment and calculate the dose.
You need cold-weather protection without the combined cleaning and cetane package. Diesel Cold Flow is the dedicated preventive option. Add the published dose while fuel is above its cloud point, before a wax-related restriction develops.
Manufacturer directions: AMSOIL G3526, April 2024. Checked 2026-10-16.
You want anti-gel protection together with injector cleaning, lubricity and cetane benefits. Diesel 4-IN-1 combines those functions in one treatment. Use it for preparation before fuel clouds; it is not the emergency procedure for fuel that has already gelled.
Manufacturer directions: AMSOIL G3525, January 2026. Checked 2026-10-16.
You reported fuel that is already gelled or a restricted filter. Diesel Recovery is the emergency choice for gelled fuel, with a filter-and-tank procedure. A restriction can have other causes, so confirm the problem and follow your vehicle service instructions. This is not a preventive anti-gel treatment.
A new fuel filter restores full power faster. Follow the current bulletin and vehicle filter-service instructions.
Manufacturer directions: AMSOIL G2598, April 2024. Checked 2026-10-16.
For injector cleaning as your main goal, compare Diesel Injector Clean. Choose its package-specific treatment chart before measuring the dose. This product does not provide anti-gel protection; revisit the cold-weather question if your travel or parking conditions change.
Manufacturer directions: AMSOIL G3186, April 2024. Checked 2026-10-16.
You want combined injector cleaning, lubricity and cetane benefits without anti-gel protection. Diesel Injector Clean + Cetane Boost fits that routine. It does not prevent gelling. Choose the correct package chart in the calculator because the 8 fl oz bottle uses a different rate from 16 fl oz and larger packages.
Manufacturer directions: AMSOIL G3571, April 2024. Checked 2026-10-16.
For cetane improvement as your main goal, compare Diesel Cetane Boost. It is the targeted cetane choice here and does not provide anti-gel protection. Use its published treatment level and keep a separate winter-prevention plan when conditions call for one.
Manufacturer directions: AMSOIL G3188, April 2024. Checked 2026-10-16.