75w85 Vs 75w90 Gear Oil

75w85 Vs 75w90 Gear Oil
75w85 Vs 75w90 Gear Oil

Oil manufacturing companies have been re-designing and modifying their newly launched gear oils for quite a long time. Modern-day vehicle demands modern-day engine, with every change it requires the most updated oil, featuring latest and utmost quality.

To be frank the comparison is rather far-fetched when it comes to spotting any differences regarding 75w 85 and 75w 90. 75w 90 is an overall good to go oil, where the 75w 85 is “considered” to offer better fuel economy. This difference can be observed under precise and thorough tests in a lab. However, to address a big difference in the real world is quite a stretch.

75w85 Vs 75w90

SAE 75w 90 has a more consistent thickness. It gets thicker when introduced to heat and thinner when exposed to the sudden drop in the temperature. On the other hand, the 75w 85 is a fully synthetic gear lubricant oil with high performance with top-notch base oils.

Super Tech Full Synthetic Gear Oil

Super Tech Full Synthetic Gear Oil

The base oil is much lighter.

The base oil is much thicker.

It provide superior gear protection

Provides high resistance to thermal breakdown

Premium extreme pressure additives & rust preventatives

Helps prevent foaming, rust, and corrosion

It protects hypoid gears, manual transmissions, gearboxes, passenger car and light truck

It formulated for the high-performance needs of all stern drives and outboard motors

It is more suitable to use in cold weather.

The performance of it is not so good in cold weather for being sheer stable.

Recommended where API GL-5 and MT-1, MACK GO-J, SAE J2360 and MIL-PRF-2105E (PG-2) are specified

For use where API GL-5 is specified

Main Features 

Designed For Wintry Season

One of the main concerns an ideal gear oil has to withstand is the ability to function in the coldest of weather. The oil is a liquid itself that is very exposed to getting thicker and losses its natural viscosity due to the cold temperature. But with 75w 90, it sustains its usual texture with the intact flow. Thus, it allows you to use it throughout the years in every weather condition.

Similarly, 75w 85 has artificial intelligence to cope and adjust itself with the changing weather facts. In summer and under the scorching sun it gets thicker not permitting the oil agents to melt and leak. On the other hand, in winter when everything seems to get frozen, the 75w 85 becomes thinner for effortless easy flow.

Excellent Thermal Stability

Both 75w 85 and 75w 90 gear oils come along with the adhesive quality to remain thermally stable under extreme pressure. A sudden acceleration, changing lanes or reverse; in short the on and off the start of the engine can spark the possibility of a severe system failure. But with 75w 85 and 75w 90, you can shake off your worry and let them do the work.

Protect From Rust & Corrosion

75w 90 is not just a gear fuel, moreover, it has additives that assist the oil to protect the gear spikes from wear off and catching rust. It minimizes corrosion due to the constant vibration and never-ending friction. It also reduces chattering in limited-slip differentials.

Unlike, 75w 90, the 75w 85 gear oil doesn’t focus on the complementary factors. It solely concentrates on lubrication. The good execution of lubricant engine results in long extended life of the interior engine, gear teeth and effortless traveling.

Compatible With Lubricants

One of the biggest flex of 75w 90 is; it is compatible with other conventional gear lubricants unlike any other gear oil available in the market. It works just as well as conventional oil and even better.

When it comes to lubrication there is no better oil than 75w 85 which does the job more precisely. It has been made with the highest level of professionalism that provides the maximized protection against rust and corrosion.

Especially Recommendation

75w 90 gear oil has been a regular recommendation for conventional and limited-slip differentials. The non-synchronized manual transmission where API GL-5 or API FL-4 fluid is specified, 75w 90 can work in full swing.

75w 85 is made in such a way to provide the ultimate solution for all your lubrication issues. Designed with exceptional drivetrain security and innovative manufacturing techniques, 75w 85 gear oil is surely one of the best in its field.


One of the biggest downfalls of both these gear oils is that they can get a bit too thin when it comes to changing weather conditions. When these oils tend to lose their natural viscosity the texture starts to drip and spread, leaving an oily mess behind. You obviously don’t want your oil to leak yet in extreme condition both 75w 85 and 75w 90 can seep through the gear not providing the expected result.

Are They Interchangeable?

Yes, you can use 75w 85 instead of 75w 90 or do the reverse. They are interchangeable and will most definitely be replaced without causing any harm.

What’s Is Their Biggest Difference?

75w 85 is considered to be the better one for its being a gear lube. It is considered to offer better mileage compared with 75w 90. However, with the naked eye or without any strict test both these gear oil provides almost the same pros and cons.


The rating of 7w 85 is 4.9 stars out of 5. However, even with the same sort of output the rating of 75w 90 different just by 0.1 stars owning the average rating of 4.8 stars out of 5. There is no room for great loss or regret since they both are identical. Feel free to choose any one of them without much hesitation.

Frequently Asked Questions (FAQ)

Can I use 75w85 instead of 75W90?
Yes, you can use 75w85 instead of 75W90. The two oils are very similar, and either one will work well in your car. The main difference between the two is the viscosity, or thickness, of the oil. 75W90 is slightly thicker than 75w85, so it may provide better protection for your engine in extreme conditions. However, both oils will do a good job of keeping your engine clean and running smoothly.

75w85 gear oil is a type of motor oil that is used in vehicles with manual transmissions. This oil helps to lubricate the gears and bearings in the transmission, reducing wear and tear on these components. Gear oils with this viscosity grade are typically used in warmer climates, as they have a lower viscosity (thinner consistency) than other gear oils. This allows the oil to flow more easily and reduces friction within the transmission.

Yes, 75w85 synthetic is a type of synthetic motor oil. This oil is designed for use in vehicles that require a higher viscosity of oil, such as trucks and SUVs. This oil can provide superior protection and performance in these types of vehicles.


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