10 Best Gear Oils 2025

As a gearhead, you know that finding the perfect gear oil is crucial for maintaining the performance and longevity of your vehicle. That's why we've reviewed and scored many products in the gear oils category, and we've found products ranging from a 7.5 score up to an impressive 9.7 score. The top spot on our list goes to ‎Red Line, specifically their MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant. This premium oil not only provides excellent protection against wear but also improves shifting in colder temperatures, making it the ideal choice for any manual transmission. Don't settle for subpar gear oil - upgrade to the best with ‎Red Line. Keep reading to discover the rest of our top 10 picks.