Royal Purple® Max-Tane® is formulated for year-round use in all types of light, medium and heavy duty diesel engines, and is compatible with any type or grade of diesel fuel, including #1 diesel and #2 diesel, biodiesel and ultra-low-sulfur diesel (ULSD). Max-Tane is specifically formulated to solve problems associated with today’s new HPCR (High Pressure Common Rail) diesel injection systems. Safe for use with all types of diesel exhaust emission systems equipment, including diesel particulate filters (DPFs) and catalytic converters. Do not pour into Diesel Exhaust Fluid.


  • Increases Cetane Number by up to 8*
  • Increases fuel economy by up to 10%
  • Improves engine startup and reliability in both warm and cold temps
  • Improves cold flow by preventing gelling
  • Cleans deposits from fuel injectors, combustion chambers, intake valves and piston crowns
  • Provides lubricity to entire fuel system
  • Reduces smoke and odor* When used as directed.


The minimum recommended dosage is one (1) ounce per five (5) gallons of diesel fuel. High performance applications can safely use one (1) ounce per two (2) gallons of diesel fuel for maximum benefit. If uncertain of exact tank size, round up. Replace cap after bottle has been emptied and dispose of properly.

20 Ounces – 100 Gallons

15 Ounces – 75 Gallons

10 Ounces – 50 Gallons

5 Ounces – 25 Gallons

Available Sizes

Available SizesPart NumberItem Number
6 x 20-Oz. Case06755301695175256
20-Oz. Bottle11755



PDS Max-Tane SDS Max-Tane

Independent Test Results

Higher cetane allows quicker ignition of diesel, which boosts power/ performance and improves completeness of combustion. With less non-ignited hydrocarbons inside the combustion chamber, deposit formation is reduced. Optimized combustion also results in faster cold startups, smoother and quieter engine operation, reduced downshifts, less soot/black smoke production, reduced emissions, and improved fuel economy. Max-Tane provides maximum cetane boost as it contains 100% active ingredients, and unlike other products is not blended with inactive solvent carriers.

*Testing performed by Intertek Automotive Research.

Diesel particulate emissions are captured by the DPF, where they accumulate and cause clogging unless burned off during regeneration cycles. With improved combustion efficiency, less particulate soot accumulates in the DPF, requiring fewer regenerations. Cleaner filters also reduce exhaust backpressure, allowing efficient engine operation and reduced temperatures. Stop-and-go urban driving causes incomplete regenerations, which can require removal/manual cleaning or replacement of DPF. Max-Tane keeps DPFs clean and helps prevent costly downtime resulting from manual cleaning or replacement of DPF.

*Testing performed by Intertek Automotive Research.

High Pressure Common Rail (HPCR) diesel injectors are vulnerable to fuel contaminants due to extremely tight 1-3 micron clearances between injector assemblies and needle plungers. When deposits form, needle plungers stick, resulting in reduced fuel atomization and 5-12% losses in fuel economy. Max-Tane contains potent, diesel- specific detergents that keep HPCR injectors clean and deposit-free. It also contains friction modifiers that prevent sticking of HPCR needle plungers. This allows complete atomization of diesel entering combustion chambers, and restores lost fuel economy.

*Testing performed by ATD GmbH.

Wax naturally found in diesel forms gels in cold temps, which clogs filters/injectors, and prevents engines from starting. The temperature at which gel begins to clog the fuel filter is the “Cold Filter Plugging Point” or (CFPP). Max-Tane reduces CFPP an average of 28°F., which allows diesels to reliably start/run in the cold temperatures. Max-Tane is the only “All-in-One” additive that combines summer benefits of cetane boost and fuel economy improvement with the winter benefit of CFPP reduction.

*Testing performed by ATD GmbH.

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