Manual transmission oil recommendations

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Models Considered. Consumers Consulted. Hours Researched. Updated December Written by Bob Beacham. Buying guide for best manual transmission fluid For those who love driving, a manual transmission is a favorite. There are lots of additives that claim to prevent leaks and make your transmission run more smoothly. However, the danger is that they can mask underlying problems. Other Products We Considered.

The BestReviews editorial team researches hundreds of products based on consumer reviews, brand quality, and value. We then choose a shorter list for in-depth research and testing before finalizing our top picks. These are the products we considered that ultimately didn't make our top 5.

Synchromesh Manual Transmission Fluid. Manual Transmission Fluid. Synchro Manual Transmission Fluid. Our Top Picks. Gives you strong performance at all temperatures, while increasing the efficiency of your manual transmission system.

Valvoline SynPower Gear Oil is a superior sulfur-phosphorus extreme pressure gear lubricant formulated with synthetic raw materials and additives to provide excellent performance. It is designed to provide excellent extreme pressure protection, excellent load carrying capacity, low foaming performance, excellent corrosion protection and excellent thermal stability protection.

It is recommended for conventional and high performance applications. Valvoline SynPower transmission oil is recommended for use in axle applications requiring factory filled or drained and filled levels with limited slip performance. Valvoline SynPower gear oil is recommended for use in axle applications requiring limited slip by filling or draining and filling at the factory. Full synthetic gear oil. Ensures exact friction behavior and offers excellent ageing resistance.

Even under the most difficult conditions and with large temperature fluctuations, it guarantees perfect functioning of the unit. Highest lubrication reliability, maximum wear protection due to wide range of viscosity. Enables easy shifting and extremely quiet running. This unique formula also ensures continuous performance by dispersing and holding on to critical areas without creating resistance, providing benefits in both start-up and continuous performance while protecting against corrosion.

The proprietary technology is a smart material that is attracted to areas of heat and friction. As pressures increase with speed or load, the specialty lubricants, combined with active coating technology in the oil, can form a self-lubricating ceramic film in areas of high load and heat. This provides critical protection that actively identifies areas that require increased lubrication, and sometimes not only reduces or eliminates wear but can also repair damaged surfaces. This state-of-the-art formulation features an exclusive blend of high viscosity, shear stable synthetic base oils and an additional treatment of high performance additives.

Severe Gear Synthetic EP Gear Lube retains its viscosity to provide long-lasting protection against metal-to-metal contact. The proprietary additives form an iron sulfide barrier coating on gear surfaces, providing the ultimate line of defense against wear, pitting and scoring. High-quality full synthetic gear oil. Provides maximum wear protection under heavy duty operating conditions and during prolonged draining.

Improved thermal stability and excellent shear stability for outstanding wear protection. High additive reserves for extended oil change intervals according to manufacturer specifications.

Excellent cold flow properties. Best wear protection and best transmission efficiency. Fuel savings even over short distances at low outside temperatures. Stable lubricating film even under heavy loads. Exceptional corrosion protection and good compatibility with non-ferrous metals. Lubricant for the 70W80 GL-4 manual transmission, which offers faster gear changes, an improved friction coefficient and better protection of the transmission.

It also provides better cold gear changes and works on both high and low mileage vehicles. No compromises. Oil for mechanical transmissions of Mitsubishi cars. The fluid is recommended for a manual gearbox, providing a gentle change of gears at different temperatures. The Quicksilver brand has been a leader in supplying uncompromising engine oils, parts and accessories to the marine industry for over 65 years.

Quicksilver is the leading supplier of Mercury engine parts, oils and accessories for the marine industry, as well as all brands of original equipment in the marine and motorsport industries. The company has built a loyal following by supplying the highest quality products, tested through some of the most rigorous environments and test procedures.

No aftermarket company can match the level of research and design that Quicksilver has achieved; buying Quicksilver means buying performance, protection and peace of mind. Motorcraft SAE 75W Synthetic Rear Axle Lubricant is manufactured using high quality synthetic base oils and performance additives to provide improved thermal and oxidative high temperature stability.

It helps to reduce operating temperatures. It has improved wear protection for hypoid wheels, excellent shear stability and protects against rust and corrosion. Recommended for all road, truck and off-road vehicles, including all forms of high-performance racing, as well as other stationary and mobile equipment.

Specially designed for use in differentials, manual transmissions, worm gears, power dividers, compressors, oil lubricated wheel bearings, transfer cases, pumps and all transmissions. They contain a special additive package that increases lubricity and ensures less gear noise and longer bearing life.

Excellent for use in limited slip differentials. Designed to withstand high temperatures without losing its lubricity. Max Gear ensures that gears run smoother, quieter, cooler and longer without overhaul. A direct reduction in drag in the powertrain has a huge advantage for trucks and other four-wheel drive vehicles: better gas mileage. Max Gear is formulated with a friction modifier additive — no additional additives are required. It is popular in the rear differentials of the latest generation of Ford trucks and many other popular models.

Red Line synthetic transmission oils are designed to provide the highest level of protection and efficiency for your powertrain. Red Line offers a complete line of powertrain lubricants optimized for use in differentials, transmissions or transaxles over a wide temperature range.

Full synthetic Valvoline SynPower transmission oil is designed for ultimate protection and performance. A thermally stable extreme pressure transmission lubricant functions and protects in both high and low extreme temperature conditions. SynPower Gear Oil is specifically recommended for ratchet hypoid differentials and is compatible with conventional gear lubricants. On some cars, the transmission dipstick can easily be confused with the crankcase oil dipstick, so you should be aware of the location of your transmission.

Look towards the back of the engine, near the firewall. In front-wheel-drive cars, the transmission dipstick is normally located at the front of the engine, connected to the transaxle.

Lucas Oil Stabilizer can be mixed with any petroleum-based or synthetic oil and is formulated for petrol or diesel engines. Lucas Transmission Fix is a solvent-free formula that prevents slippage, hesitation, and rough shifting on worn-out transmissions and completely eliminates most seal leaks.

Use in any transmission for preventive maintenance. Also in light manual transmissions increase shifting comfort and transmission life. Transmission fluid is a slippery fluid that acts as a lubricant for all moving parts inside your transmission.

In an automatic transmission, this fluid also serves as a coolant and viscous fluid that transfers power from the engine to the transmission.

Different fluids are used for different transmissions. Automatic transmissions use something that — shockingly — is called automatic transmission fluid. Manual: Most manufacturers recommend that the manual transmission fluid should be changed every 30, to 60, miles. For heavy-duty use, some manufacturers suggest changing the transmission fluid every 15, miles.

Automatic: The service intervals for an automatic transmission vary from every 30, miles … until never. The typical service interval is 60, to , miles. Changing more often does not hurt. Manual: With a manual transmission, the problem is not so much the deterioration of the fluid, but rather the contamination of the fluid. This contamination occurs over time as the synchronizers, bearings and gears in the transmission wear out.

The resulting metal particles then float around in the lubricant. In addition, we all know that oil with microscopic metal particles in it does not lubricate as well as clean oil.

Therefore, if these contaminants are not drained off, they shorten the life of your gearbox. Automatic: Because more heat is generated in an automatic transmission, automatic transmission oil actually breaks down and decomposes during use. In addition, as with a manual transmission, the automatic transmission fluid is also contaminated by worn parts of the transmission. If these contaminants are not drained, they will shorten the life of your transmission.

Numbers of 60 and higher indicate gear oil while lower numbers indicate engine oil. This means 75w90 and 80w90 are both gear oil. The 75w90 gear oil is used under extreme pressure conditions and is recommended for limited-slip differentials and for use in colder climates. Used in heavy duty manual transmissions, final drives and axles, high temperatures will not effect the heavy film left by this oil. Accordingly with SAE, oils are divided into types depending on the viscosity index.

In temperate climates, it is advisable to choose greases such as 75w85, 80w90, 75w Log In Username. Login Forgot Your Password? Forgot Your Username? New Customer? Create an Account. My Account Orders list Wishlist Checkout.