Red Line

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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.

Red Line Best Sellers

Last Updated: Jan 11, 2026

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

Fuel System Cleaners

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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

EASY TO USE: Use one bottle per tank for most effective treatment, additive cleans nearly 100% efficiency in one treatment

15 Ounce (2 Pack)

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

Fuel System Cleaners

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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

EASY TO USE: Use one bottle per tank for most effective treatment, additive cleans nearly 100% efficiency in one treatment

One 15 Ounce Bottle

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

Fuel System Cleaners

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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

EASY TO USE: Use one bottle per tank for most effective treatment, additive cleans nearly 100% efficiency in one treatment

15 Ounce (4 Pack)

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

Gear Oils

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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

POPULAR GEAR OIL FOR - in many late model BMW, Dodge, Ford, GM, Jeep, Lexus, Mercedes-Benz, Ram, Toyota, also popular in many Formula racing transaxles, including Hewland LD-200 and FTR sequential

WHY RED LINE - Established in 1979, Red Line Products perform & protect better than any on the market. No compromises

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

Gear Oils

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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

POPULAR MOTOR OIL FOR - Mercedes 235.10, Dodge/Fiat BOT 350 M3, GM BOT 303 mod, Toyota/Scion Manual Transmissions Gear Oil LV, VW/Audi and BOT270A Graziano Transaxle for Aston Martin, Audi & Lamborghini.

WHY RED LINE - Established in 1979, Red Line Products perform & protect better than any on the market. No compromises

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

Motor Oils High Mileage Oils

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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*

POPULAR OIL KIT FOR - 2007-up H-D motorcycle with the 96-inch and larger Twin Cam engines, users must purchase one extra bottle of Primary Chain Case Oil to meet this engine's 38 oz (45 oz dry) capacity, compared to the 32 oz wet capacity of a Milwaukee-Eight, Evolution or V-Twin case

WHY RED LINE - Established in 1979, Red Line Products perform & protect better than any on the market. No compromises

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

Gear Oils

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SATISFIES REQUIREMENTS - for gear oil viscosity of SAE 75W80, 75W, 80W and 85W, as well as SAE 30 and SAE 10W30 motor oil

POPULAR GEAR OIL FOR - in many late model BMW, Dodge, Ford, GM, Jeep, Lexus, Mercedes-Benz, Ram, Toyota, also popular in many Formula racing transaxles, including Hewland LD-200 and FTR sequential

WHY RED LINE - Established in 1979, Red Line Products perform & protect better than any on the market. No compromises

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

Gear Oils

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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

POPULAR GEAR OIL FOR - GL-1, GL-3 and GL-4 applications, as well as where most special synchromesh fluids are specified. Safe for brass synchros, as it lacks the reactive sulfurs found in most GL-5 oils that cause damage

WHY RED LINE - Established in 1979, Red Line Products perform & protect better than any on the market. No compromises.

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

Motor Oils High Mileage Oils

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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

PRIMARY CASE OIL - For 1984-to-present V-Twin American motorcycle engines, including Evolution, Twin Cam, and aftermarket engines of similar design

WHY RED LINE - Established in 1979, Red Line Products perform & protect better than any on the market. No compromises

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

Motor Oils High Mileage Oils

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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

High-temp stability prevents deposits on combustion chambers, exhaust ports, upper ring and piston crown

Suggested use at 50:1, but useful up to 100:1 depending on operating conditions

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

Gear Oils

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SATISFIES REQUIREMENTS - for gear oil viscosity of SAE 75W80, 75W, 80W and 85W, as well as SAE 30 and SAE 10W30 motor oil

POPULAR GEAR OIL FOR - in many late model BMW, Dodge, Ford, GM, Jeep, Lexus, Mercedes-Benz, Ram, Toyota, also popular in many Formula racing transaxles, including Hewland LD-200 and FTR sequential

WHY RED LINE - Established in 1979, Red Line Products perform & protect better than any on the market. No compromises

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

Motor Oils High Mileage Oils

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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

POPULAR GEA OIL FOR - Nissan 350Z and 370Z (also most Maxima, Altima & Sentra), Mitsubishi Evolution, Hyundai, Kia and Quaife synchro manual trans applications

WHY RED LINE - Established in 1979, Red Line Products perform & protect better than any on the market. No compromises

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Red Line 80204 WaterWetter Super Coolant - 12 Ounce

Antifreezes & Coolants

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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

POPULAR FOR USE IN - new or used antifreeze (including DEX-COOL and long-life versions) to improve the heat transfer of ethylene and propylene glycol systems, satisfies ASTM D2570 and ASTM D1384 corrosion tests for glycol-based antifreezes

WHY RED LINE - Established in 1979, Red Line Products perform & protect better than any on the market. No compromises

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Red Line 58204 Heavy Shockproof Gear Oil - 1 Quart

Engine & Oil Fluid Additives

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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

POPULAR GEAR OIL FOR - Many performance racing applications like Sprint, Midget, Dirt Late Model and Quick Change Differentials, Detroit Lockers and spools, NHRA Top Fuel and Funny Car rear ends, most popular ShockProof product, many racing and specialty applications

WHY RED LINE - Established in 1979, Red Line Products perform & protect better than any on the market. No compromises

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

Gear Oils

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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

POPULAR GEAR OIL FOR - API GL-5, GL-6, MT-1, MIL-L-2105E, SAE J2360 and Chrysler spec MS-9763, suitable replacement for a differential calling for an 80W90 or SAE 90 gear oil

WHY RED LINE - Established in 1979, Red Line Products perform & protect better than any on the market. No compromises

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

Transmission Fluids

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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

WHY RED LINE - Established in 1979, Red Line Products perform & protect better than any on the market. No compromises

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

Motor Oils High Mileage Oils

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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

POPULAR PERFORMANCE OIL FOR - VW/Audi 502.00/503.01/505.01-99, BMW LL-01 and Ford WSS-M2C946-A, API SN/SM/SL/SJ/SH/SG/CF and ACEA A3/B3/B4, GM dexos1 (GM-LL-A-025, GM6094M and GM4718M) and BMW LL-01

Red Line 40605 Two-Stroke Oil Racing Synthetic - Gallon

Motor Oils High Mileage Oils

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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

High-temp stability prevents deposits on combustion chambers, exhaust ports, upper ring and piston crown

Suggested use at 50:1, but useful up to 100:1 depending on operating conditions

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

Transmission Fluids

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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.

POPULAR POWESPORTS OIL FOR - UTVs & Side by Sides, ATVs, sportbikes and other powersports vehicles, suitable for JASO MA/MA2 applications.

WHY RED LINE - Established in 1979, Red Line Products perform & protect better than any on the market. No compromises.

Red Line FAQs

Is Red Line Legit?

Yes, Red Line is a legitmate brand on Amazon. After conducting a comprehensive analysis of 18,223 customer reviews for Red Line products on Amazon, we have determined its average rating. With a strong performance and good quality, Red Line has received an average rating of 4.8 from numerous buyers, indicating that Red Line are trustworthy and live up to their claims. Therefore, it is safe to make purchases from Red Line on Amazon.

Amazon has strict policies and safety measures in place that ensure only legitimate sellers and products are allowed on their platform. It also provides a secure payment gateway and offers buyer protection, ensuring your transaction is safe. In the unlikely event that there's an issue with your purchase, Amazon's customer service and return policies are designed to protect your interests.

How to find more Red Line products?

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How does findthisbest choose the top Red Line products?

We analyze millions of Red Line products reviews and customer reviews to recommend the best picks for most consumers. We have a professional team with decades of experience to test the products, which can help ensure that we provide our readers with accurate advice and best recommendations.

How can I purchase Red Line products via FindThisBest?

Go to the Red Line page.
Select the product you want in the Red Line buying guide, and then view the product on Amazon. For example, if you are interested in the top 1 product Red Line 60103 SI-1 Complete Fuel System Cleaner -..., you can view it on Amazon page.
Place your order on Amazon.

Who are the manufacturers of the Red Line products?

Most of the Red Line products are produced 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.

What is the purpose of your brand guide?

Our mission is to provide you with the most up-to-date and objective information about the Red Line products, helping you make more informed buying decisions. We recommend best choices of the products from the Red Line brand, helping you make better shopping choices with less time and energy.

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