Castrol Fork Oils

Developed for both road and off-road applications, Castrol hydraulic oils support smooth fork action by managing compression and rebound effectively. Designed for road motorcycles with high performance demands, Castrol fork oils help riders to maintain stability, steering response and comfort. Castrol’s formulation approach focuses on maintaining viscosity under load, reducing foaming, and supporting predictable suspension behaviour over extended service intervals. As such, these products have a naturally high viscosity index and are made from a highly refined base stock, combined with bespoke additives.

Within the Castrol fork oil range, different viscosity grades are available to suit varying suspension designs, rider preferences and manufacturer recommendations. Lighter grades are typically selected for faster fork response and improved sensitivity over smaller surface changes, while heavier grades provide firmer damping control, often preferred for heavier motorcycles, aggressive riding styles or consistent performance under higher loads. At Broughton Lubricants, our technical specialists can discuss your application and the relevant specifications to help you find a suitable product for your needs.

Castrol fork oils are compatible with conventional and advanced motorcycle suspension systems and their anti-wear characteristics support the protection of internal fork components such as seals and bushings, helping to reduce friction and prolong service life. Low foaming properties contribute to consistent damping by preventing air entrapment, which can otherwise lead to erratic suspension response and reduced control. Castrol fork oil allows air to escape, and also provides an increased braking safety margin thanks to its wear and corrosion prevention properties.

Across the range, Castrol fork oils are engineered to resist shear and oxidation, and maintain performance even when subjected to repeated compression cycles and temperature variation. Castrol fork oils are often selected alongside other specialist Castrol fluids such as motorcycle engine oils, brake fluids and chain lubricants to maintain balanced performance across the entire machine.

Broughton Lubricants supplies Castrol fork oils as part of a wider range of motorcycle and automotive lubricants, backed by extensive product knowledge and technical support. With over 100 years in the business, we have long been trusted by customers for reliable service and strong technical advice. You can speak directly with the team for guidance on selecting the correct fork oil grade based on manufacturer specifications, riding conditions or suspension setup.

With decades of experience, the experts at Broughton Lubricants can also advise on suitable alternatives where products have been discontinued, upgraded, replaced or otherwise made unavailable. This can help you to maintain continuity or enjoy the benefits of an optimised product based on your vehicle's manufacturer's recommendation.

As the UK’s only Castrol Ambassador Distributor for both industrial and automotive product lines, Broughton Lubricants offers a level of access, expertise and continuity that supports informed product selection across the full Castrol range. We also offer a suite of oil testing services to help you find the right product to deliver the performance you need.

To learn more about Castrol fork oil, or how we can help you to enjoy superior anti-fade damping performance and protection against corrosion in your motorcycle's engine, contact Broughton Lubricants today. Call us on 03300 555 109 or use our online enquiry form to request a call back at your convenience.