

🛠️ Gear up for peak power and protection—don’t let your drivetrain fall behind!
Royal Purple’s Max Gear 75W-90 synthetic gear oil set (4 x 1 quart) delivers superior protection and performance for heavily loaded automotive and marine gears. Engineered with proprietary Synerlec additives, it maximizes horsepower, reduces friction and operating temperatures, extends gear life, and meets strict warranty requirements—all while being environmentally responsible and ideal for limited-slip differentials.
| Brand | Royal Purple |
| Package Information | Bottle |
| Liquid Volume | 1 Quarts |
| Item Weight | 10 Pounds |
| Recommended Uses For Product | truck and automotive front or rear differentials, manual transmissions and lower gear units of marine engines that specify use of an API GL-5 or GL-4 fluid |
| Viscosity | 75 (at 100°C), 90 (at 100°C with high-temperature, high-shear conditions) |
| Item Form | Oil |
| Manufacturer | Royal Purple |
| UPC | 192019015363 |
| Number of Items | 4 |
| Model | Royal Purple |
| Item Weight | 10 pounds |
| Product Dimensions | 10 x 10 x 10 inches |
| Is Discontinued By Manufacturer | No |
| Manufacturer Part Number | 4-of-01300 |
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