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GL-5 85W-140 Oil Equivalent — Brand Comparison & Cross Reference

GL-5 85W-140 is a high-viscosity extreme-pressure gear oil meeting API GL-5 specification. Designed for hypoid gears in truck and automotive differentials operating under heavy loads, high speeds, and shock loading.

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Brand Comparison Table

The following table shows the GL-5 85W-140 equivalent product from each major lubricant brand. Use this to find a direct substitute when switching suppliers or sourcing alternatives.

BrandProduct Name
Sinopec logoSinopec
GL-5 85W-140
Castrol logoCastrol
Transmax Axle AP 85W-140
Mobil logoMobil
Mobilube HD 85W-140
Shell logoShell
Spirax S2 A 85W-140
Valvoline logoValvoline
HP Gear Oil 85W-140
Caltex logoCaltex
Delo Gear EP-5 85W-140
Fuchs logoFuchs
Titan Supergear 85W-140
Penrite logoPenrite
Gear Oil 85W-140
Gulf Western logoGulf Western
Gear Lube 85W-140

Common Applications

  • Heavy-duty truck differentials and rear axles
  • Trailer axle lubrication
  • Automotive differentials under towing loads
  • Off-road vehicle transfer cases
  • Hypoid gear sets in commercial vehicles

Frequently Asked Questions

What is the difference between GL-4 and GL-5 gear oil?

GL-5 contains significantly more extreme-pressure (EP) additives than GL-4, making it suitable for hypoid gears and high-load differentials. GL-4 is designed for manual transmissions. Using GL-5 where GL-4 is specified may damage yellow metal (brass/copper) synchronisers.

When should I use 85W-140 instead of 80W-90?

85W-140 is recommended for heavy-duty applications such as towing, hauling, and severe-service differentials. 80W-90 is suitable for standard passenger vehicle differentials under normal loads. Always follow the vehicle manufacturer's recommendation.

Can GL-5 85W-140 be used in manual transmissions?

Generally no. GL-5 EP additives can be corrosive to the brass synchroniser rings found in manual transmissions. Use GL-4 specification oil for manual gearboxes unless the manufacturer specifically approves GL-5.

Related Gear Oil Specifications

Limited Slip 85W-90/90GL-4 90

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