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Red Line

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* We independently evaluate all recommended products and services. If you click on links we provide, we may receive compensation.

When purchasing a product, price is the consumer's primary concern. At present, Red Line has 306 products for sale. Red Line products range in price from $13.89 to $146, and the average price of all the products is about $44.06.

We found that most of the Red Line products are manufactured by Red Line Oil. The manufacturer provides Red Line with a steady supply of products, and they have a good cooperative relationship with each other.

You can confidently purchase Red Line products from the seller R/A Hoerr Incorporated. The brand holds an average rating of 4.8, testifying to its excellent reputation.

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Red Line Best Sellers

Last Updated: Jan 11, 2026

Red Line 60103 SI-1 Complete Fuel System Cleaner - 15 Ounce (2 Pack)

  • DESIGNED TO EXCEED EXPECTATIONS: Red Line complete SI-1 fuel system cleaner treatment for cleaning and preventing corrosion in fuel systems
  • PERFORM AND PROTECT: Fuel additive cleans injectors, carburetors, valve and combustion chamber deposits with a powerful, concentrated blend of high-temp and low-temp detergents
  • EFFICIENT FUEL BURN: Gas treatment that enhances gasoline stability, while reducing the build up of gum and varnish formation

Red Line 60103 SI-1 Complete Fuel System Cleaner, Cleans and Prevents Corrosion in Fuel Systems, Cleans Injectors, Carburetors, Valve and Combustion Chamber Deposits - 15 Ounce

  • DESIGNED TO EXCEED EXPECTATIONS: Red Line complete SI-1 fuel system cleaner treatment for cleaning and preventing corrosion in fuel systems
  • PERFORM AND PROTECT: Fuel additive cleans injectors, carburetors, valve and combustion chamber deposits with a powerful, concentrated blend of high-temp and low-temp detergents
  • EFFICIENT FUEL BURN: Gas treatment that enhances gasoline stability, while reducing the build up of gum and varnish formation

Red Line 60103 SI-1 Complete Fuel System Cleaner - 15 Ounce (4 Pack)

  • DESIGNED TO EXCEED EXPECTATIONS: Red Line complete SI-1 fuel system cleaner treatment for cleaning and preventing corrosion in fuel systems
  • PERFORM AND PROTECT: Fuel additive cleans injectors, carburetors, valve and combustion chamber deposits with a powerful, concentrated blend of high-temp and low-temp detergents
  • EFFICIENT FUEL BURN: Gas treatment that enhances gasoline stability, while reducing the build up of gum and varnish formation

Red Line 50104 75W85 GL-5 Full Synthetic Gear Oil for Hypoid Limited Slip Differentials - 2 Quarts

  • SATISFIES REQUIREMENTS - for gear oil viscosity of SAE 75W80, 75W, 80W and 85W, as well as SAE 30 and SAE 10W30 motor oil
  • APPLICATIONS - include differential oil, final drive oil, gear oil and transfer case fluid, this product is not designed for use in most manual transmissions or transaxles with synchronizers, as extreme slipperiness may cause shifting problems
  • CONTAINS - additional friction modifiers for suitability with clutch-type limited slip differentials - for most LSDs, no additional friction modifiers are required, known formerly as LightWeight Gear Oil

Red Line 50604 MT-LV 70W/75W GL-4 High-Performance Full Synthetic Gear Oil Lubricant for Manual Transmissions & Transaxles - 1 Quart

  • HIGH PERFORMANCE - gear protection and longer synchro life, Satisfies the gear oil viscosity requirements of 70W & 75W
  • OFFERS QUICKER SHIFTS - a perfect synchronizer coefficient of friction, Eliminates notchy shifting, even when cold
  • SAFE FOR BRASS SYNCHROS - as it lacks the reactive sulfurs found in most GL-5 oils that cause damage, Recommended for GL-1, GL-3 and GL-4 applications as well as where most special synchromesh fluids are specified

Red Line 90226 20W50 Powersport Motor Oil V-Twin - 1 Powerpack Kit

  • COMPLETE KIT - for motorcycles equipped with Evolution, Milwaukee-Eight and Twin-Cam engines*
  • KIT INCLUDES - 5 quarts of 20W50 Motorcycle Oil, 1 quart of V-Twin Transmission Oil with ShockProof, 1 quart of Primary Chain Case Oil, 1 bottle of Fuel Injection Cleaner for Powersports, a sticker kit, a Red Line Oil embroidered hat and a versatile funnel
  • TESTED FOR COMPATIBILITY - includes enough fluids for a complete oil change*

Red Line 50104 75W85 GL-5 Full Synthetic Gear Oil for Hypoid Limited Slip Differentials - 4 Quarts

  • SATISFIES REQUIREMENTS - for gear oil viscosity of SAE 75W80, 75W, 80W and 85W, as well as SAE 30 and SAE 10W30 motor oil
  • APPLICATIONS - include differential oil, final drive oil, gear oil and transfer case fluid, this product is not designed for use in most manual transmissions or transaxles with synchronizers, as extreme slipperiness may cause shifting problems
  • CONTAINS - additional friction modifiers for suitability with clutch-type limited slip differentials - for most LSDs, no additional friction modifiers are required, known formerly as LightWeight Gear Oil

Red Line 50305 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL) - 1 Gallon

  • HIGH PERFORMANCE - gear protection and longer synchro life. Recommended for GL-1, GL-3, and GL-4 applications.
  • QUICKER SHIFTS - perfect synchronizer coefficient of friction and eliminates notchy shifting, even when cold
  • REQUIREMENTS - gear oil viscosity of 75W; 80W; SAE 40 10W40 and 15W40 motor oil

Red Line 42904 V-Twin Primary Case Oil, for use with UTVs, ATVs and Sportbikes - 1 Quart

  • FRICTION BALANCED CASE OIL - Most synthetics are too slippery for clutch operation. Our V-Twin Primary Case Oil is a balanced oil limiting slip and performing a smoother operation
  • BOOSTS VEHICLE PERFORMANCE - Improves clutch operation while reducing wear and temperature, providing a longer clutch lifespan
  • PERFORM & PROTECT - This product is for use in the primary chaincase with wet-diaphragm spring clutches. Perfect for Motorcycles, ATVs, and Powersports

Red Line 40603 Two-Stroke Oil Racing Synthetic - 16 Ounce

  • Ultimate in two-cycle performance, extreme cleanliness
  • Popular in racing and daily applications like motorcycles, marine, snowmobile racing, etc.
  • Dyno proven for gains of 3-5% and more power over longer runs

Red Line 50104 75W85 GL-5 Full Synthetic Gear Oil for Hypoid Limited Slip Differentials - 1 Quart

  • SATISFIES REQUIREMENTS - for gear oil viscosity of SAE 75W80, 75W, 80W and 85W, as well as SAE 30 and SAE 10W30 motor oil
  • APPLICATIONS - include differential oil, final drive oil, gear oil and transfer case fluid, this product is not designed for use in most manual transmissions or transaxles with synchronizers, as extreme slipperiness may cause shifting problems
  • CONTAINS - additional friction modifiers for suitability with clutch-type limited slip differentials - for most LSDs, no additional friction modifiers are required, known formerly as LightWeight Gear Oil

Red Line 50504 MT-85 Manual Transmission 75W85 GL-4 Gear Oil - 1 Quart

  • HIGH PERFORMANCE - Gear protection and longer synchro life. Recommended for GL-1, GL-3, and GL-4 applications, as well as where most special synchromesh fluids are specified
  • OFFERS QUICKER SHIFTS - Excellent gear and synchro protection, balanced friction control & slipperiness for easier shifting even in cold climates
  • SAFE FOR BRASS SYNCHROS - GL-4 Gear Oil lacks the reactive sulfurs found in most GL-5 oils that cause damage. Recommended for GL-1, GL-3 & GL-4 applications

Red Line 80204 WaterWetter Super Coolant - 12 Ounce

  • UNIQUE AGENT - for cooling systems that doubles the wetting ability of water
  • RUST AND CORROSION PROTECTION - allows for use of straight water in racing or reduced antifreeze levels in warm climates
  • DIRECTIONS FOR USE - one bottle for most passenger cars and light trucks, treats 3 to 5 gallons or 13.2 to 15.9 liters, vehicles with larger cooling systems should use two bottles, small cooling systems should use 1oz (3 to 4 capfuls) per quart

Red Line 58204 Heavy Shockproof Gear Oil - 1 Quart

  • FULLY-SYNTHETIC FORMULAS - created from polyol ester base stocks, offer excellent lubrication under extreme conditions
  • ENGINEERED TO PROVIDE - the highest degree of protection and improvement of differential efficiency for better mileage, longer drain intervals, and less wear, exceed API GL-5 specifications
  • NOT RECOMMENDED - for most synchro applications due to the product's extreme slipperiness

Red Line 57904 75W90 GL-5 Synthetic Gear Oil for Hypoid Limited Slip Differentials - 1 Quart (2 Pack)

  • MOST POPULAR - Red Line gear oil, with thousands of applications for passenger cars, light trucks and racing vehicles
  • CONTAINS - additional friction modifiers for suitability with clutch-type limited slip differentials - for most LSDs, no additional friction modifiers are required
  • NOT DESIGNED - for use in most manual transmissions or transaxles in passenger vehicles, since the extreme slipperiness may cause synchronizer mesh issues that lead to shifting problems

Red Line 50304 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL) - 1 Quart (2 Pack)

  • HIGH PERFORMANCE - gear protection and longer synchro life. Recommended for GL-1, GL-3, and GL-4 applications.
  • QUICKER SHIFTS - perfect synchronizer coefficient of friction and eliminates notchy shifting, even when cold
  • REQUIREMENTS - gear oil viscosity of 75W; 80W; SAE 40 10W40 and 15W40 motor oil

Red Line 15305 SAE 5W30 Fully Synthetic Motor Oil - Gallon

  • FULL-SYNTHETIC - ester/PAO formula for passenger cars, light trucks, performance vehicles and marine applications
  • HIGH DETERGENCY - allows extended drain intervals and provides increased cleanliness, Improved fuel economy and ring seal for more power
  • BLENDED WITH - polyol ester/PAO base stocks that feature natural multi-grade properties, avoiding unnecessary additives that hinder lubricity

Red Line 40605 Two-Stroke Oil Racing Synthetic - Gallon

  • Ultimate in two-cycle performance, extreme cleanliness
  • Popular in racing and daily applications like motorcycles, marine, snowmobile racing, etc.
  • Dyno proven for gains of 3-5% and more power over longer runs

Red Line 42804 Full Synthetic Gear Oil, V-Twin Transmission Oil with Shockproof - 1 Quart

  • CUTTING EDGE TECHNOLOGY - Shockproof technology designed to make a big impact against big impacts.
  • QUIET SMOOTH SHIFTING - V-Twin Transmission oil dampens transmission noise, reducing the notorious shifting clunk found in these gearboxes.
  • IMPROVES PERFORMANCE - Transmission fluid that dramatically reduces temperature, providing thicker oil films between gear teeth and resists throw-off.

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