Shell gear oil specifications

Written by dan ketchum
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Shell gear oil specifications
Gear oil helps lubricate manual transmissions in large trucks. (semi truck image by max blain from Fotolia.com)

High-viscosity gear oil lubricates rear axles and heavy-duty manual transmissions in large vehicles. This long-life oil sometimes serves industrial applications, as well, preventing rust, reducing foaming and promoting lubrication in gear housings and chain drives. Among multigrade oils and greases, global energy group Shell produces various labels of gear oil with varying specifications as part of its line of trucking products. Before using gear oil on any machinery, check on the American Petroleum Institute service designation of the machine.

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Shell Dentax

This Shell-brand gear oil focuses on use in automotive engines, such as buses and coaches, and transmissions on industrial-grade equipment with spiral bevels and flexible couplings. Shell recommends Dentax gear oil for differentials that do not require an extreme pressure differential; this oil services equipment that calls for an American Petroleum Institute Service Designation of GL-1. Dentax oils have high oxidation stability and a low foaming tendency. 80W-90, 140 and 250 grades of Dentax gear oil have a viscosity of 139, 955 and 1,669 at 40 degrees Celsius.

Shell Dentax S

The Shell Dentax S label gear oil is a fully synthetic lubricant. Shell recommends this lubricant for use in the manual transmissions of heavy-duty trucks that require straight mineral or non-extreme pressure oil. This gear oil services trucks with extended drain intervals and Class 6, 7 and 8 manual transmissions. For industrial applications, this oil lubricates bearings and gears with recommended ISO Viscosity Grades of 150 and 220. Dentax S has a high film strength and an anticorrosive formula compatible with MIL-L-2104D and MIL-L-46152B engine oils. Shell Dentax S has a viscosity index of 151.

Shell Spirax EW

Shell Spirax EW gear oils are multigrade lubricants with extreme pressure qualities. These oils feature a stable composition, suitable for lubricating heavy-duty axles, off-road axles, spiral bevel-gear truck differentials and over-the-road truck fleets in conditions of extreme heat, cold and moisture. Shell Spirax EW grades SAE 75W-90 and 80W-140 feature a viscosity index of 160 and 145, respectively. These gear oil lubes are compatible with synthetic and mineral-based axle lubricants at any ratio.

Shell Spirax HD

Spirax HD, or Heavy Duty, is a multigrade, extreme-pressure gear oil, suitable for heavy-duty truck and automotive differentials, manual transmissions, oil-lubricated wheel bearings, drive trains and off-road equipment with special torque conditions. In industrial equipment, Spirax HD lubricates hypoid, spur, bevel, helical and worm gears in differentials, transmissions, final drives and steering mechanisms. This multi-viscosity gear oil contains sulphur and phosphorus additives. Shell's 80W-90 grade Spirax HD gear oil has a viscosity index of 100 while the 85W-140 label has a viscosity index of 98.

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