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Valvoline Restore and Protect
* When used as directed for four or more consecutive oil changes. Based on adapted IIIH testing.

API GL-5 Gear Oil

Keep your gearbox and differentials in peak condition with high-performance API GL-5 gear oil from Opie Oils. Designed for extreme pressure applications, API GL-5 transmission oil offers excellent protection against wear, corrosion, and high-temperature breakdown. Browse our full range below to find the ideal gear oil for your vehicle.

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76 Products (Viewing: 60 - 76 of 76)

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Valvoline Gear Oil 75W-80 RPC
Millers Oils Trident Professional MTF 75w-90 Synthetic Transmission Oil
RRP £13.00
£11.95
Price Beater
EXOPRO 75w-90 SS GL4 and GL5 Semi Synthetic Extreme Pressure Gear Oil
Comma SX 75w-90 GL-5 Semi Synthetic Transmission Fluid
Opie Price
£10.99
Price Beater
Febi Bilstein 75w-85 Axle Drive Oil GL-5 | 48785
Amsoil Synthetic SEVERE Gear Oil 75w-90
RRP £31.93
£29.95
Price Beater
Millers Oils Ginetta Tech LS 75w-90 Fully Synthetic Competition Gear Oil
Millers Oils Ginetta Tech 75w-90 Fully Synthetic Competition Gear Oil
Febi Bilstein SAE 80W-90 GL-4/5 Gear Oil (170166)
Motul 90 PA Mineral Limited Slip Differential (LSD) Oil
Castrol TRANSMAX Axle Long Life 75W-90 Axle Fluid
Castrol TRANSMAX Universal 75W-90 Gear Oil
Opie Price
£20.95
Price Beater
Millers Oils Gear Oil Limited Slip 90 GL5
RRP £17.99
£17.95
Price Beater
Millers Oils EE Performance MTF 75w80 Gear Oil
Opie Price
£22.99
Price Beater
Shell Spirax S5 ATE 75W-90 Synthetic Technology High Performance Gear Oil
RED LINE Gear Oil 75w-140 GL-5

1 US Quart (0.946 litre)

RRP £29.40
£28.99
Price Beater
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GL-5 specification gear oils are made for severe conditions, containing up to 6.5% effective anti-scuffing additives. The general application of oils in this class is for hypoid gears with significant displacement of axes. The most common use of GL5 oils is in differentials, but they are often used in gearboxes and sometimes in transfer boxes.

There is a lot of out-of-date and incorrect information about GL5 oils being unsafe for use in a lot of gearboxes. If you are concerned about that, please contact our expert team for more details, but generally, gearboxes are fine with GL5 oils.

At Opie Oils, we stock a comprehensive selection of API GL-5 oil, with options from leading brands such as Castrol, Millers Oils, Red Line, and LIQUI MOLY. Whether you need a mineral, semi-synthetic, or fully synthetic formula, we have the perfect solution to meet your vehicle’s specifications.

Shop for GL-5 gearbox oil at Opie Oils today, and don’t forget to explore our full range of transmission fluids and differential oils to keep your vehicle running at its best.