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Redline Fluids

If you're looking for BMW engine oil, brake fluid, transmission and diff fluid, power steering fluid, or coolant, this is the place. We also stock a variety of additives that we have seen benefits from.

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Red Line Limited Slip Differential 75w140 Gear Oil
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Redline - Corporate Logo
T#:394774
Part#: REDLINE8A
In Stock
Starting at $ 26.79 USD
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Starting at $ 26.79 USD
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All sets of 12 now 10% off regular price!

Red Line 75W140 is a full synthetic high-performance gear oil that is an excellent substitute for expensive factory fluid and an upgrade over off-the-shelf economy fluid. Red Line thoroughly evaluates the manufacturer's recommendations and only makes a fluid recommendation if their own product meets or exceeds the original specification. In many cases the Red Line synthetic will outperform the factory supplied fluids. We've been using Red Line Oil in our BMWs since we opened in 1994 and it remains our best selling BMW differential fluid. 75/140 is a specialized weight used for BMW M3, M5, and M6 models with the M Variable limited slip diff (all M models since 2001). Red Line fluid is used in nearly all E46 M3, E92 M3, E60 M5 we service as well as the custom differentials that we sell. It's great for the street where the polyol-ester base has natural lubricity and friction modifiers lead to smoother and quieter operation with lower operating temps than the factory fluid. We also use it in the track cars we build and prep. It may also be used in other specialized situations where a regular 75/90 will be too thin at elevated temperatures and your diff builder has approved a heavier weight oil.

Recommended for API GL-5, GL-6, MT-1, MIL-L-2105E, and SAE J2360. An alternative to the very expensive factory BMW SAF-XJ+FM diff fluid (#83222282583).

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Red Line 5W-40 Synthetic Engine Oil - 1 Gallon - BMW
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Redline - Corporate Logo
T#:4921478
Part#: 15405
In Stock
$ 69.99 USD
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$ 69.99 USD
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Red Line 5W40 synthetic motor oil. We have been using RedLine Oil in our street cars and race cars for years. Hands-down, it is the Number One brand of high-performance lubricant for BMWs. Red Line 5W40 engine oil provides for quicker lubrication and easier start-up. Reduces turbo lag and provides more power and economy in a properly functioning engine, while providing 25% thicker oil films than a petroleum 5W40 or 10W40.
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10w-40 Engine Oil - 1 Quart - Case Of 12
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Redline - Corporate Logo
T#:384812
Part#: 11404KT
In Stock
$ 218.99 USD
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$ 218.99 USD
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10w-40 Engine Oil - 1 Quart - Case Of 12 is an essential choice for vehicle owners seeking to ensure optimal engine performance. This fully synthetic ester formula provides exceptional wear protection and is designed to perform well across a wide range of operating conditions, making it ideal for both everyday driving and extreme environments. Stock up and save with this case of 12 quarts, ensuring that you always have quality engine oil on hand.

Benefits:

  • Superior Protection: The synthetic ester formula offers outstanding wear protection, extending the life of the engine.
  • Versatile Performance: Designed for various operating conditions, this engine oil maintains viscosity and performance whether in extreme heat or cold.
  • Long-Lasting: The high-quality formulation provides extended oil change intervals, saving time and money.
  • Improved Fuel Efficiency: Helps to reduce engine friction, which can enhance fuel economy and overall efficiency.
  • Convenient Case: Comes in a case of 12 quarts, perfect for stocking up and ensuring you never run low on essential engine oil.
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E46 M3 Red Line Transmission & Differential Oils
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Redline - Corporate Logo
T#:3547
Part#: E46M3-REDLINE
Ships on Jul 27, 2026
$ 91.99 USD
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$ 91.99 USD
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We have been using Red Line Oil in our street cars and race cars for years. Hands-down, it is the Number One brand of high performance lubricant for BMWs. We put Red Line Oil in our 80,000 mile street M3 and noticed smoother shifts, especially on 1-2 and 2-3 shifts. Also, our short shift kit is less notchy! For our E46 M3 racecars we used RedLine in the transmission and diff. Some of our races can go as along as 6 hours and we're happy report outstanding results. To clear up any confusion this package is what we recommend for the E46 M3. Not only do we not believe in 'lifetime' fluids, we believe that Red Line fluid will give you smoother shifts and as good or better protection for your transmission and diff internals than the factory fluids (factory fluid is also not available in a quart-sized container - we've tried).This package includes two quarts of ATF D4 and two quarts of 75/140.
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Engine Oil (10w-60) - 1 Quart - Case Of 12
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Redline - Corporate Logo
T#:384813
Part#: 11704KT
In Stock
$ 218.99 USD
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$ 218.99 USD
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Engine Oil (10w-60) - 1 Quart - Case Of 12 is a premium choice for performance enthusiasts, particularly popular for newer BMW M-cars such as the E46 M3 and E60 M5. This fully-synthetic ester formula is engineered for passenger cars, light trucks, and performance vehicles, providing exceptional wear protection and friction reduction across a wide range of operating conditions. With its high detergency, this engine oil allows for extended drain intervals while maintaining cleanliness.

Benefits:

  • Optimal Performance: Specifically recommended for API SN/SM/SL/SJ/SH/SG/CF and ACEA A3/B3/B4 applications.
  • Excellent Wear Protection: The formula reduces friction and offers superior wear protection, enhancing engine longevity.
  • Extended Drain Intervals: High detergency helps maintain cleanliness and allows for longer oil change intervals.
  • Improved Fuel Economy: Provides better ring seal for increased power and efficiency, contributing to fuel savings.
  • High Temperature Stability: Superior oxidation resistance ensures consistent lubrication even at elevated temperatures.
  • Versatile Compatibility: Fully compatible with both conventional and synthetic motor oils, making it easy to switch without issues.
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Red Line Manual Transmission/Differential Fluid 75W-90
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Redline - Corporate Logo
T#:394833
Part#: REDLINE25A
In Stock
Starting at $ 97.99 USD
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Starting at $ 97.99 USD
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Red Line MTL may be used in transmissions which recommend 75W, 80W, or 85W GL-4 gear oils, or SAE 30 or 5W/10W30 motor oils. If a 90W GL-4 or SAE 40, 10W40, or 15W40 is required, MT-90 may be used. If the transmission or transaxle requires an SAE 90 GL-5 gear oil, then Red Line 75W90NS or 75W140NS Gear Oil may be used.
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E39 M5, Z8 Red Line Transmission & Differential Oils
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Redline - Corporate Logo
T#:1638
Part#: E39M5-REDLINE
Ships on Jul 27, 2026
$ 91.99 USD
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$ 91.99 USD
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We have been using Red Line Oil in our street cars and race cars for years. Hands-down, it is the Number One brand of high performance lubricant for BMWs. Not only do we not believe in 'lifetime' fluids, we believe that Red Line fluid will give you smoother shifts and as good or better protection for your transmission and diff internals than the factory fluids. We put RedLine Oil in all of our service vehicles, racecars, and our personal cars with outstanding results each time. It's also very effective at making short shift kits less notchy! This package includes two quarts of ATF D4 and two quarts of 75/140. Both are the correct weight and formula for the E39 M5 and Z8 transmission and diff and are API-certified.
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Manual Transmission/Differential Fluid 75W-90 - One Gallon
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Redline - Corporate Logo
T#:377991
Part#: 57905
In Stock
$ 97.99 USD
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$ 97.99 USD
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Enhance Your BMW's Performance with Red Line 75W90 Gear Oil

Enhance the performance of your BMW's differentials and manual transmissions with Red Line 75W90 Gear Oil, a top choice for fluid service. This gear oil is ideal for car and light truck differentials, including those in racing applications. It contains a special friction modifier for limited slip differentials and promotes smooth shifting in both cold and hot conditions. Red Line 75W90 exceeds API GL-5 specifications and can be used in transmissions requiring 75W, 80W, or 85W GL-4 gear oils, as well as SAE 30 or 5W/10W30 motor oils. For specific requirements like SAE 90 GL-5 gear oil, Red Line offers compatible alternatives like 75W90NS or 75W140NS Gear Oil.

Benefits:

  • Ideal for BMW differentials and manual transmissions
  • Special friction modifier for limited slip differentials
  • Promotes smooth shifting in various conditions
  • Exceeds API GL-5 specifications
  • Compatible with a wide range of transmission requirements
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