Best Manual Transmission Oil

Peter | 02-01-2026

In this article, we will explore the Best Manual Transmission Oil that are now on the market. In addition to that, we have provided you with a detailed guide that will assist you in choosing the right product. We really hope that by looking through the reviews of the top Best Manual Transmission Oil products that we’ve provided below, you’ll be able to quickly narrow your choices and select the one that best satisfies your needs.

We have spent lots of time testing. According to our research, we think Valvoline Best Manual Transmission Oil is the best overall. For more of our top picks, read on! Also, check out our buying guide for some tips on how to choose the right Best Manual Transmission Oil.

Editor's Choice
Valvoline Synchromesh Manual Transmission Fluid 1 Quart
Valvoline Synchromesh Manual Transmission Fluid 1 Quart
Premium Pick
TRIAX Synergy Gear MT 75W-80 GL-4, Full Synthetic Manual Transmission and Gear Box (1 Gallon)
TRIAX Synergy Gear MT 75W-80 GL-4, Full Synthetic Manual Transmission and Gear Box (1 Gallon)
Budget Pick
Red Line 50304 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL)- 1 Quart
Red Line 50304 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL)- 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 Quart

Valvoline Synchromesh Manual Transmission Fluid 1 Quart
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. 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

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

Red Line 50304 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL)- 1 Quart
9.1

Redline Oil

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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

4. TRIAX Synergy Gear MT 75W-90 GL-4 (MT-90); Full Synthetic Manual Trans Fluid; Smooth Shifting; No

  • Widely compatible with a huge range of manual transmissions from top manufactuers Jeep, Chrysler, BMW, VW/Audi, Ford, GM, Mercedes Benz 235.11, Toyota, Mazda and many others; Use wherever SAE 75W-90 GL-4 fluids are specified
  • Frictionally optimized for exceptionally smooth shifting, synchronizer engagement, and frictional stability; Prevents transmssion shudder, gear sticking or slipping. Optimal torque transfer and power curve stability.
  • 100% Synchro Safe - No reactive sulfurs; yellow metal / brass synchro safe as well as copper and aluminum alloys found in sensitive transmission components.
  • Excellent gear protection in high horsepower / high speed conditions and sustained mechanical / thermal loads such as racing and off-road conditions
  • Capable of 100,000+ miles drain intervals in most driving conditions, allowing for much longer life than most other fluids.
  • PAO / Ester Full synthetic formulation with no compromises; very low pour point with rapid shifting even in very cold weather (-45F) and outstanding film stability in high temperature conditions.

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

  • 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

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

Royal Purple-ROY01512 ROYAL PURPLE SYNCHROMAX QT. TRANSFLUID, 1 Quart (32 Ounces)
8.5

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

7. ULTRA 1PLUS SAE 50 Full Synthetic Manual Transmission Fluids (CD-50) (5 Gallon Pail)

ULTRA 1PLUS SAE 50 Full Synthetic Manual Transmission Fluids (CD-50) (5 Gallon Pail)
8.3

Ultra 1plus

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  • SEVERE SERVICE PROTECTION: Specially formulated for heavy-duty transmissions, this SAE 50 Full Synthetic Fluid offers rust, oxidation, and corrosion protection in severe heat and shear conditions.
  • EXTENDED EQUIPMENT LIFE: U1P-Drive CD-50 ensures longer equipment life with exceptional gear/bearing wear protection and anti-wear additives.
  • ALL-CLIMATE PERFORMANCE: Experience superior performance in all weather conditions, thanks to high viscosity-index and low pour point for year-round use.
  • FUEL ECONOMY BOOST: Enjoy easier shifts and reduced fluid drag in cold weather, enhancing fuel economy during challenging conditions.
  • VERSATILE APPLICATIONS: Ideal for off-road heavy-duty trucks, buses, and heavy equipment in forestry, construction, and mining industries meeting the demands of diverse applications.

8. Triax Gear Premium LS 80W-90, GL-5 Limited Slip Ready, Manual Transmissions, Hypoid Gear Systems,

  • WIDEST SPEC RANGE ON THE MARKET: widely compatible with a very large number of hypoid gear systems, differentials, transmissions and axle assemblies.
  • SEVERE SERVICE MAX: Exceptional shear stability and oxidation resistance. Polyphosphate EP proprietary additive system offers substantial improvement in performance over previous generation, low cost, gear oils
  • BUILT IN LIMTED SLIP ADDITIVE - Does not require "additional" LS additive. Its built into the product, optimized for all limited slip differentials, including those with built in wet brakes.
  • OUTSTANDING SCUFFING PROTECTION - Superb gear and syncron protection, facilitating extremely long transmission life. Exceeds Load Stage 13 extreme pressure requirements beyond 120,000 lbs / sqi.
  • SHEAR STABLE - Excellent thermal stability and high load capacity without viscosity breakdown, facilitates excellent film strength under high loads, high temp and high shear conditions.

9. TRIAX Synergy Gear MT 75W-90 GL-4 (MT-90); Full Synthetic Manual Trans Fluid; Smooth Shifting; No

  • Widely compatible with a huge range of manual transmissions from top manufactuers Jeep, Chrysler, BMW, VW/Audi, Ford, GM, Mercedes Benz 235.11, Toyota, Mazda and many others; Use wherever SAE 75W-90 GL-4 fluids are specified
  • Frictionally optimized for exceptionally smooth shifting, synchronizer engagement, and frictional stability; Prevents transmssion shudder, gear sticking or slipping. Optimal torque transfer and power curve stability.
  • 100% Synchro Safe - No reactive sulfurs; yellow metal / brass synchro safe as well as copper and aluminum alloys found in sensitive transmission components.
  • Excellent gear protection in high horsepower / high speed conditions and sustained mechanical / thermal loads such as racing and off-road conditions
  • Capable of 100,000+ miles drain intervals in most driving conditions, allowing for much longer life than most other fluids.
  • PAO / Ester Full synthetic formulation with no compromises; very low pour point with rapid shifting even in very cold weather (-45F) and outstanding film stability in high temperature conditions.

10. Valvoline Advanced Full Synthetic 75W-90 Gear Oil 1 QT

Valvoline Advanced Full Synthetic 75W-90 Gear Oil 1 QT
7.7

Valvoline

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  • High-performance additives deliver 1.5X better gear wear protection
  • High and low temperature protection ranges from -50F to 300F degrees for cold temperature fluidity and high temperature performance
  • Contains limited slip for optimal performance of the clutch pack, while also providing 1.5x stronger extreme pressure protection and 30% better protection against towing and heavy loads
  • Advanced full synthetic helps prevent noise and reduce chattering, while protecting gear teeth from wearing out prematurely
  • Fights rust and corrosion with corrosion inhibitors and safeguards against impurities, oxidation and thermal breakdown
  • Meets or exceeds requirements for: SAE J2380, MACK GO-J, Meritor 0-94 Rev Level A, API GL-5, GMW 16445; the addition of a supplemental friction modifier (Ford M2C-118-A, Chrysler MS-5630, or GM 1052358) is not required. Can be used in non-synchronized manual transmissions calling for API GL-4
  • American made and formulated, from the Original Motor Oil brand trusted for more than 150 years

Peter

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