Royal Purple 01300 Max Gear 75W-90 High Performance Synthetic Automotive Gear Oil - 1 qt.

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  • List Price: $25.49
  • Price: $20.47
  • Availability: Out Of Stock

1 Quart (32 Ounces)

  • Greater wear protection for severe service performance
  • High temperature performance low temperature fluidity
  • Excellent water separation which prevents corrosion
  • Lower coefficient of friction
  • Compatible with other oils


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Max-Gear is an ultra-tough automotive gear oil. It's designed to maximize power and provide unsurpassed protection to heavily loaded gears. It makes gears run smoother, quieter, cooler and longer without overhauls. Max-Gear outperforms other gear oils because it combines the highest quality synthetic oils with Royal Purple's proprietary Synerlec additive technology. Max-Gear is recommended for use in truck, motor home/RV 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. All viscosities of Max-Gear are formulated with hypoid friction modifiers necessary for use in clutch or cone type differentials. No additional additives are necessary.

Max Gear is an ultra-tough, high performance synthetic gear oil designed to provide maximum protection to heavily loaded gears. Max Gear excels in axles containing open, limited-slip, locker, and spool equipped differentials. Max Gear is also recommended for use in 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. Max Gear is non-corrosive to soft yellow metals (brass, bronze, copper) and is safe for use in manual transmissions with Synchronizers.

Cushioning Molecules

The cushioning molecules in Max Gear absorb gear impact to prevent fatigue and minimize wear. Max Gear also significantly reduces friction, which lowers gearbox temperatures, extends equipment life and improves fuel efficiency.

Max Gear outperforms ordinary gear oils by combining the highest quality synthetic oils with Royal Purple’s proprietary Synerlec additive technology. Max Gear makes gears run smoother, quieter, cooler and longer without overhauls. Max Gear is formulated with hypoid friction modifier additive necessary for use in clutch or cone type differentials.

IMPORTANT NOTES: No additional additives are necessary. Max Gear oils contain the friction modifier additive needed for limited-slip differentials. This product is NOT for use in wet-clutch systems, such as those commonly used in motorcycles and ATV transmissions and some marine drive units.

Performance Advantages

  • Maximizes horsepower
  • Extends gear and bearing life
  • Reduces operating temperature / friction
  • Severe service performance
  • Superior corrosion protection
  • Separates rapidly from water
  • Available Max Gear Viscosities: 75W-90, 75W-140, 80W-90, 85W140 and 90
Synerlec Additive Technology

Synerlec, Royal Purple’s proprietary, additive lubricant technology, is the cornerstone of RP’s entire product line. It creates an ionic bond that adheres to metal parts to provide continuous protection even at start-up and strengthens the oil to provide unparalleled performance and protection.

Royal Purple’s high film strength prevents contact between metal parts reducing friction and heat thereby transferring more power to the drive wheels while maximizing the lubricant service life. As well, Synerlec amplifies the already-exceptional oxidation resistance of the synthetic base oils.

Royal Purple remains on the metal surface long after ordinary lubricants would have been squeezed out by pressure and heat. It actually improves mating surfaces by responding to increased pressure with increased viscosity until the metal peaks (asperities) undergo deformation and flow into the low spots. Over time, the metal surface becomes extremely smooth and can even develop a mirror-like surface.


Technical Details
Brand Royal Purple
Item Weight 2 pounds
Product Dimensions 3.2 x 3.2 x 11 inches
Item model number 1300
Exterior Smooth
Manufacturer Part Number 01300
OEM Part Number 01300

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