Best Manual Transmission Oil

Peter | 31-05-2025

With so many Best Manual Transmission Oil brands on the market – from prominent names like Valvoline,Genuine Honda,Royal Purple,Red Line to smaller manufacturers – making the right choice can feel overwhelming. But we’re here to help simplify your search for the best product.

We extensively tested and evaluated dozens of top-rated Best Manual Transmission Oil across various price points, spending over 100 hours comparing the contenders side-by-side. Based on our in-depth first-hand research, we compiled this list of stand-out Best Manual Transmission Oil to consider. Our top recommendation is Valvoline Best Manual Transmission Oil for its uncompromising quality and performance.

Below you’ll discover more of our favorite Best Manual Transmission Oil picks. And be sure to consult our buying guide for expert insights on selecting the ideal product for your individual needs and budget. With us guiding your decision, you can shop confidently knowing you’ve chosen an exceptional Best Manual Transmission Oil you’ll truly love.

Editor's Choice
Valvoline Synchromesh Manual Transmission Fluid 1 QT
Valvoline Synchromesh Manual Transmission Fluid 1 QT
Premium Pick
Valvoline High Performance SAE 80W-90 Gear Oil 1 QT
Valvoline High Performance SAE 80W-90 Gear Oil 1 QT
Budget Pick
Genuine Honda Fluid 08798-9031 Manual Transmission Fluid - 1 Quart
Genuine Honda Fluid 08798-9031 Manual Transmission Fluid - 1 Quart

Top 10 Best Manual Transmission Oil

We researched and compared the top products in the Best Manual Transmission Oil category to provide you with these recommendations.

1. Valvoline Synchromesh Manual Transmission Fluid 1 QT

Valvoline Synchromesh Manual Transmission Fluid 1 QT
9.8

Valvoline

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  • Meets the demands of manual synchro transmissions and manual transaxles
  • Excellent wear protection under high loads and pressure to help extend the life of your manual transmission
  • Helps optimize outstanding synchronizer performace with protective layer to ensure smooth and efficient shifting
  • Provides better oil flow in both low and high temperatures
  • Recommended for GM Part Numbers 12345349 and 12345577; Chrysler Part Number 4874464; and top up applications in GM Part Number 12377916. It also meets API GL-4 and is recommended for use where Mopar C Series PN 68092630AA is called for.
  • American made & formulated to maximize your transmission's life and improve its performance

2. Genuine Honda Fluid 08798-9031 Manual Transmission Fluid - 1 Quart

Genuine Honda Fluid 08798-9031 Manual Transmission Fluid - 1 Quart
9.5

Genuine Honda

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  • Package Dimensions: 6.858 L x 22.352 H x 10.922 W (centimeters)
  • New and improved formula that meets quality standards
  • Improved shift quality
  • Lower fluid friction

3. Valvoline High Performance SAE 80W-90 Gear Oil 1 QT

Valvoline High Performance SAE 80W-90 Gear Oil 1 QT
9.8

Valvoline

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  • Protects Against Severe Temperatures To Help Extend Service Life
  • Formulated With Extreme-Pressure Additives To Minimize Gear Wear From Shock Loads
  • Helps Protect Against Gear Wear From Scuffing, Scouring, Corrosion And Pitting
  • Recommended For Conventional Hypoid Differentials And Non-Synchronized Manual Transmissions In Passenger Cars, Light Trucks, Sport Utility Vehicles, Vans And Heavy-Duty Trucks Where An Api-Gl5 Or Gl-4 Fluid Is Specified

4. Royal Purple-ROY01512 ROYAL PURPLE SYNCHROMAX QT. TRANSFLUID, 1 Quart (32 Ounces)

Royal Purple-ROY01512 ROYAL PURPLE SYNCHROMAX QT. TRANSFLUID, 1 Quart (32 Ounces)
8.9

Royal Purple

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  • Greater wear protection
  • Package Dimensions: 28.575 H x 8.636 L x 8.89 W (centimetres)
  • Package Weight: 0.839 kilograms
  • Country of Origin : United States

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

Red Line 50504 MT-85 Manual Transmission 75W85 GL-4 Gear Oil - 1 Quart
8.7

Red Line

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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

6. Red Line 50204 SAE 75W80 API GL-4 Manual Transmission and Transaxle Lubricant (MTL) Car Gear Oil - 1

Red Line 50204 SAE 75W80 API GL-4 Manual Transmission and Transaxle Lubricant (MTL) Car Gear Oil - 1
8.5

Red Line

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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 - MLT Gear Oil with balanced friction control for most manual transmission synchronizers. Other synthetic gear oils are often too slippery.
  • 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 MOTOR OIL FOR - BMW, Honda/Acura, Ford Focus, late-model Mini Cooper, Land Rover/Range Rover LT77S, Mitsubishi, Dodge & Jeep NV1500, NV3500, NV3550 & NV5600 truck transmissions.
  • WHY RED LINE - Established in 1979, Red Line Products perform & protect better than any on the market. No compromises.

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

Red Line 50304 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL) - 1 Quart (2
8.3

Red Line

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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

8. Valvoline Advanced Full Synthetic 75W-140 Gear Oil 1 QT

Valvoline Advanced Full Synthetic 75W-140 Gear Oil 1 QT
8

Valvoline

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  • Exceptional high and low temperature protection ranging from -22F to 390F degrees
  • Reduces chattering and protects gear teeth from oxidation, rust, and wear
  • Fights corrosion and rust with emulsifying agents and safeguards against impurities, oxidation and thermal breakdown
  • Meets the demands of conventional and limited slip rear differentials where API GL-5 is specified, as well as non-synchronized manual transmissions that require API GL-4

9. TRIAX Synergy Gear MT 75W-80 GL-4, Full Synthetic Manual Transmission and Gear Box (1 Gallon)

  • Full synthetic GL-4 75W-80 with PAO and Esters, manual transmission fluid. Exceeds all OEM fluid performance for 75W-80 gear, MT, differential, synchromesh, and transfer cases
  • No reactive sulfurs; protects all yellow metal components; extremely long drain intervals up to 5x OEM intervals
  • Contains a custom build, high-performance detergency adpack coupled with friction modifiers, defoamers, and a corrosion inhibitor to handle various kinds of contamination; features 204 VI Index, extreme viscosity stability, and arctic grade, -60F pour point
  • Excellent shifting performance, rapid, smooth shifting, and no slipping; eliminates notchy shifting and "grinding" gear noise
  • Compatible with Honda, Acura, Toyota, BMW, Audi, Mini, BMW X5 Transfer Cases, Jeep, Chrysler, Ford, Mercedes Benz, and many others

10. Mobil Delvac Syn Transmission 50, 1 gal

Peter

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