- Greater Wear Protection
- Severe Service Performance
- Lower Coefficient of Friction
- High Temperature Performance
- Low Temperature Fluidity
- Shock Load Protection
- Prevents Corrosion
- Excellent Water Separation
- Compatible with Other Oils
- Meets Warranty Requirements
- Environmentally Responsible
| List | |
|---|---|
| Starting | $16.76 (Save up to 48%) |
| Availability | Usually ships in 1 to 2 days |
| Shipping | Ships Oversize |
 | No payments for 90 days on orders of $250+ Details |
|
1 Year Price Guarantee 100% Satisfaction Guarantee |
Description
Royal Purple Max-Gear® is recommended for use in truck, RV / Motorhome, and automotive front and rear differentials, manual transmissions and lower gear units of marine engines that specify the use of an API GL-5 or GL-4 fluid. Max Gear® is an ultra-tough, high performance, GL-5 automotive gear oil designed to provide maximum protection to heavily loaded gears while maximizing power through the drive train. It outperforms other GL-5 gear oils because it combines the highest quality synthetic oils with Royal Purples proprietary Synslide® additive technology. Max-Gear® makes gears run smoother, quieter, cooler, and longer without overhauls. Synslide® additive technology makes the difference. Synslide® additive technology is noncorrosive to gears and bearings, including case-hardened gears that are easily pitted by conventional sulfur-phosphorus EP oils. Synslide® technology displaces water from metal surfaces and excels in protecting equiptment in wet environments. It also fortifies the oil against the detrimental effects of heat, which causes oil to oxidize. Synslide additive technology is truely Beyond Synthetic. 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.
Features
- Greater Wear Protection
Synerlec® additive technology forms a tough, tenacious film on all metal surfaces virtually eliminating engine wear. - Severe Service Performance
Max-Gear® exceeds Eaton's stringent GL-5 / MIL-L-2105D Gear Oil Specs. Max-Gear® also is safe for GL-4 applications or bronze synchro gears. - Lower Coefficient of Friction
Max-Gear® saves energy, reduces temperatures and maximizes power throughput. (OEM or aftermarket limited slip additives are not required.) - High Temperature Performance
Max-Gear® eliminates harmful deposits and extends oil drain intervals. - Low Temperature Fluidity
Max-Gear® meets operating requirements for vehicles operating in cold climates. - Shock Load Protection
Max-Gear® reduces fatigue failures in bearings and gears. - Prevents Corrosion
Max-Gear® protects both ferrous and nonferrous metals during operation and shutdown. - Excellent Water Separation
Max-Gear® completely separates from water, preventing an oil-water emulsion. - Compatible with Other Oils
Max-Gear® is compatible with other mineral gear oils and other synthetic hydrocarbon gear oils. - Meets Warranty Requirements
Max-Gear® exceeds OEM warranty requirements for GL-5 automotive rear axle hypoid gear lubrication. - Environmentally Responsible
Max-Gear® components are TSCA listed and meet EPA, RCRA and OSHA requirements. Max-Gear® extends oil drain intervals, eliminates premature oil changes, decreases the amount of oil purchased and disposed of and conserves energy.
Royal Purple Max Gear Synthetic Gear Oil Frequently Asked Questions
Why Use Royal Purple? See Below
My vehicle has a locking differential. Do I need to add additional friction modifiers when using your Max-Gear?
No. 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.
My vehicle's transmission specifies an API GL-4 gear oil. Can I use Max-Gear®?
Yes. Max-Gear® possesses both API GL-5 and GL-4 certification. Max-Gear® is formulated with Royal Purple's proprietary, Synslide® additive technology to provide the exceptional film strength necessary for GL-5 applications, yet it is noncorrosive to soft metals found in manual transmissions that specify a GL-4 rated lubricant.
Royal Purple Max Gear Synthetic Gear Oil Specifications
| Typical Properties* | |||||
| SAE GRADE | 75W90 | 75W140 | 80W90 | 85W140 | SAE90 |
| Viscosity | |||||
| cSt @ 40°C | 144.5 | 245 | 150.3 | 320 | 189.1 |
| cSt @ 100°C | 21 | 33.6 | 16.8 | 28 | 18.2 |
| SSU @ 100°F | 739 | 1255 | 782 | 1686 | 993 |
| SSU @ 210°F | 105 | 163 | 87 | 138 | 93 |
| CP @ -12°C | — | — | 10,110 | — | — |
| CP @ -40°C | 59,911 | 97,555 | — | — | — |
| Flash °F | 430 | 430 | 430 | 430 | 430 |
| Pour Point °F | -40 | -40 | -40 | -40 | -40 |
| Corrosion Test | |||||
| Copper | Pass | Pass | Pass | Pass | Pass |
| Bronze | Pass | Pass | Pass | Pass | Pass |
| Rust Test | |||||
| Fresh Water | Pass | Pass | Pass | Pass | Pass |
| Salt Water | Pass | Pass | Pass | Pass | Pass |
| Foam Test | Pass | Pass | Pass | Pass | Pass |
| Timken OK Load, Lbs. | 100+ | 100+ | 100+ | 100+ | 100+ |
| Four Ball EP Test | |||||
| Weld Load, kgf | 400 | 400 | 400 | 400 | 400 |
Royal Purple Max Gear Synthetic Gear Oil Installation
Simply drain existing fluid and replace with Royal Purple Max Gear. No need for any special treatment before adding. Royal Purple Max Gear is completely compatible with other oils. For additional information please call 1-877-216-5446 or 701-253-5906. You can also email us at cs@realtruck.com.Royal Purple Max Gear Synthetic Gear Oil Feature Images
| 55 Gallon Drum and 5 Gallon Pail: Severe Service Performance. Max-Gear® exceeds Eaton's stringent GL-5 / MIL-L-2105D Gear Oil Specs. Max-Gear® also is safe for GL-4 applications or bronze synchro gears. |
|
| Royal Purple Max Gear Synthetic Gear Oil: Greater Wear Protection. Synerlec® additive technology forms a tough, tenacious film on all metal surfaces virtually eliminating engine wear. |
| MaxGear 75w140: Environmentally Responsible. Max-Gear® components are TSCA listed and meet EPA, RCRA and OSHA requirements. Max-Gear® extends oil drain intervals, eliminates premature oil changes, decreases the amount of oil purchased and disposed of, and conserves energy. |
| MaxGear 85w140: Meets Warranty Requirements. Max-Gear® exceeds OEM warranty requirements for GL-5 automotive rear axle hypoid gear lubrication. |
button.
