Best Gear Oils of 2025

"I recently used the Valvoline SynPower SAE 75W-90 Full Synthetic Gear Oil for my 2017 Camaro's rear differential and I am thoroughly impressed with its performance. This gear oil provides excellent protection and lubrication, ensuring smooth operation even under extreme conditions. The 1-gallon container is a fantastic value for multiple uses, and the user-friendly packaging with a convenient spout made it easy to pour without any mess."

"I've always trusted Valvoline synthetic oil for over forty years. This particular GL-5 rated synthetic with the limited slip additive worked perfectly in my BMW E36, meeting or exceeding all requirements. The squeeze style bottle was a game changer—no spills and no pumps required while filling the rear axle!"

"I had to replace the differential fluid in my 2016 Toyota Rav Limited. I found this flexible packaging to be quite handy; it fit right into the fill port without needing a pump. I did lose a couple of ounces at the end, but overall, it did the job well!"

"I recently used the Valvoline High Performance SAE 80W-90 Gear Oil and I'm very pleased with its performance. This gear oil is perfect for maintaining smooth operation in various vehicles and machinery. The 80W-90 viscosity rating ensures excellent lubrication under different temperatures. After using it, I noticed a significant improvement in gear shifting and overall performance. The 1-quart bottle is easy to handle and the packaging is sturdy, preventing spills during use. Overall, this gear oil is a reliable and effective choice for gear lubrication!"

"This gear oil functions exactly as promised, delivering expected results without issues. I'm very satisfied with its performance!"

"I trust Valvoline as a worldwide recognized brand. The pointy spout design makes pouring into the differential much easier than using a pump. Plus, it was cheaper on Amazon than in stores, which is a win. I'll buy more for my second truck. Just a note: Amazon says it doesn't fit a 2002 Bravada, but according to the owner's manual, this is the correct oil for both differentials."

"I've noticed a significant reduction in noise and an improvement in performance after using this gear oil in my truck's differential. The viscosity holds up well under high pressure, making it a great value for the price."

"This product works flawlessly, keeping my gears smooth and quiet. The 1-gallon size is perfect for my frequent maintenance needs. I highly recommend it for anyone who needs reliable, long-lasting gear oil."

"After using it in my SUV, I found that it provided more climbing power than in previous years. The car runs smoother and has even reduced gas consumption. I'm very pleased with the results!"

"I purchased this oil because of Lucas Oils' quality. It performs exceptionally well under the stress of different temperatures while I ride my ATV. I trust it for longevity and outstanding protection."

"After installing a new posi unit, I needed to refill my rear end. This oil works perfectly!"

"I opted for this oil over Mobil One after Toyota warned me about potential damage to my axles. It's a safe choice for my older Tundra."

"I found it works great for my V6 225 and V8 300 Mercury outboards. It has kept my engines running flawlessly for years!"

"The product arrived quickly and well-packaged. It matches the color of my current oil and seems to work just as well as the Mercury oil!"

"I highly recommend this for replacing factory fluid in my new Mercury 20hp outboard after the initial break-in period!"

"I’ve used this in my 2010 Harley Electra Glide with 32,000 miles and it shifts very smoothly. I’ll definitely use it in all my bikes."

"The delivery was fast, and the price was great for my 4x4’s transmission and transfer case."

"I rely on Lucas products for everything! From gear oil to fuel treatments, it’s in my bikes, off-road toys, and daily drivers. I want to point out that it is not made in China as mentioned in the ad; as of 09/01/24, it’s still Made in USA, which is important to me."

"I needed this for my used pressure washer's pump, which required 75W90 lube. After flushing it with some oil I had, I filled it with this product, and the pump works perfectly. Plus, the price here on Amazon was better than local auto parts stores, so I saved some money too."

"I recently drained some burned-up fluid from my Subaru's differentials and replaced it with this gear oil. The difference was instant; my car could finally coast smoothly, and the throttle response improved. At just $11 shipped, it's a great baseline for any vehicle, even a beater!"

"After replacing the gear fluid in my 2020 TRD Sport Tundra with this product, the truck feels excellent after the first 500 miles. It’s like driving a new vehicle!"

"I found this product to be great for my 2024 Subaru BRZ. The shifting is improved, and it's quieter now after switching to Mobile 75/90 gear lube. I saved $30 compared to local prices!"

"For my 24-year-old Toyota Tacoma, I’m glad I got the hand pump. It made the oil change much easier. So far, everything is working well!"

"I can't beat the price of this Mobil1 Full Synthetic Gear Lubricant. It should last another 100K miles in my Land Rover Discovery 2. I love how easy it is to use; no special tools needed!"

"I've found that the shifting is smoother, and there's less noise from the differential. I really trust this brand for its quality."

"I decided to buy this larger size to save money. It works wonderfully in my Jeep differentials!"

"This gear oil is simply the best. I've used it for years with my Toyota trucks and SUVs. It really does quiet and smooth gears immediately, making a noticeable difference in my 5-speed manual.”

"After replacing the gear oil in my class 8 drive axles, I've noticed a significant drop in temperature on the highway, even during high outside temperatures. My axles now run about 25 degrees cooler. I'm really impressed so far, but I'll see how the wear holds up after about a million miles."

"This oil is super slick and seems to withstand heavy use. I consistently use it in my work truck's rear axles."

"I received my order quickly and have been using this oil in all my off-road rigs. Upgrading to the bucket and adding a pump has made servicing them twice as fast. No more dealing with those annoying squeeze bottles!"