EASY USE AT EVERY FILL-UP: Add directly to the fuel tank at each fill-up. The long neck and measuring chamber make treating fuel simple. One 41 oz bottle treats up to 275 gallons ANTI-GEL PROTECTION: Prevents gelling and helps keep diesel flowing in cold weather for reliable starts and consistent performance FOR ALL DIESEL ENGINES: Suitable for use in all diesel vehicles and equipment - light-duty, heavy-duty, pickup, SUV, van, RV, etc. (including modern HPCR systems) IMPROVES LUBRICITY (ASTM D6079): Tested to improve lubricity by 43% to help protect fuel system components, including wear-sensitive parts like the CP4 pump BOOSTS CETANE UP TO +8: Raises cetane up to 8 points for faster ignition, smoother combustion, and improved drivability; many engines run best around 48–50 while pump diesel is often 40–45 CLEANS INJECTORS: AR6500's detergent package removes injector deposits and restores spray patterns for improved atomization, supporting better performance and fuel economy SUPPORTS DPF & REDUCES REGENS: Targets deposit formation to help keep the DPF clean and reduce regeneration frequency – restores performance, fuel economy, and extends DPF lifespan KEEPS TURBO CLEAN: Helps reduce fuel soot and deposit formation that impacts turbo response, restoring boost and smoother acceleration USE AR6500 THE REST OF THE YEAR: Switch to Archoil AR6500 Diesel Treatment for maximum year-round performance. Leftover AR6300 can be stored in a cool, dark place for next winter Archoil AR6300 Winter Diesel Treatment (Two Pack) is a premium winter diesel fuel additive designed for everyday use to improve fuel quality and support performance in all diesel engines, including modern HPCR (high pressure common rail) systems. Use it at every fill-up in cold weather to keep the fuel system clean, support smoother combustion, and help prevent diesel gelling for reliable starts and consistent drivability. Simple every-fill-up dosing: Add directly to the fuel tank when refueling. The 41 oz bottle is easy to use, and one bottle treats up to 275 gallons of diesel fuel (Two Pack enough to treat 550 gallons in total). What AR6300 does: Anti-gel + cold weather protection: Helps prevent diesel fuel gelling and supports cold flow performance in freezing temperatures, helping reduce wax crystallization and fuel filter plugging so diesel keeps flowing when it’s cold. Injector cleaner + detergents: Helps remove injector deposits and support proper spray patterns for improved atomization, performance, and fuel economy (MPG). Cetane booster (up to +8): Raises cetane to promote faster ignition and smoother combustion for improved performance, especially in cold starts. Lubricity improver: Tested to improve lubricity by 43% (ASTM D6079) to support protection of wear-sensitive fuel system components, including the CP4 pump. Turbo + DPF support: Targets deposit formation to restore turbo response, improve DPF operation, and reduce DPF regenerations. For all diesel vehicles and equipment: Suitable for light-duty and heavy-duty diesel applications including pickups, SUVs, vans, RVs, and work equipment.