Red Line Oil Accessories and Fluids

Red Line Oil: Racing Heritage, Zero Compromises

Red Line Synthetic Oil has been one of the most respected names in performance lubrication since its founding in 1979. Starting with a passion for racing-grade engine oils, the company was established by Tim Kerrigan and Peter Filice in Novato, California, with a singular mission: build lubricants that could survive — and thrive — in the most demanding conditions on earth. Decades later, that uncompromising philosophy still drives every formula that leaves their facility in Benicia, California.

What separates Red Line from conventional lubricant brands is the chemistry at the core of every product. Red Line's formulations are built on a proprietary blend of Polyalphaolefins (PAO) and polyol ester base stocks — Group V base oils that deliver measurable advantages in film strength, thermal stability, and friction reduction versus conventional or even standard synthetic alternatives. Every motor oil in the lineup also features an enhanced ZDDP additive package engineered for superior wear protection, making Red Line a go-to choice for high-performance builds, flat-tappet engines, and track use alike.

A Full Lineup Built for Every Part of Your Drivetrain

Red Line's catalog spans far beyond the engine bay. The brand's gear oils earned a legendary reputation on race tracks around the world, with the SHOCKPROOF® line trusted by more racers than any competing product in the industry. Their manual transmission fluids — including the iconic MTL — are widely credited with pioneering the performance manual trans fluid market, offering precise synchro engagement and protection that conventional gear lubes simply cannot match.

Cooling system health is just as critical as lubrication, and Red Line addresses it with their engine coolant and cooling additives, including the famous WaterWetter® formula. This product works by reducing or eliminating vapor bubbles that form on hot metal surfaces, allowing more efficient heat transfer and measurably lower coolant temperatures — a key advantage for track-driven and turbocharged vehicles running hard in hot conditions.

Rounding out the lineup, Red Line's fuel system cleaners — particularly their SI-1 Complete Fuel System Cleaner — use advanced chemistry to dissolve deposits throughout the entire fuel circuit, from the tank to the injectors. The result is restored throttle response, improved combustion efficiency, and cleaner intake components with regular use.

Whether you're maintaining a daily driver, prepping a weekend track car, or building an all-out race vehicle, Red Line Synthetic Oil offers a purpose-engineered solution. Their products serve the automotive, motorcycle, marine, and powersports markets — a testament to the versatility and trust the brand has earned across more than four decades of innovation.