Fastrax Racing Pure Silicone Diff Oil 10000 CST 50ml Bottle FAST61-10K

Overview

The Fastrax Racing Pure Silicone Diff Oil 10000CST is a premium differential lubricant designed for RC car enthusiasts across the UK who demand consistency, reliability and performance from their vehicles. Whether you're a seasoned RC competitor, weekend basher, or serious hobbyist looking to optimise your RC car setup, this professional-grade diff oil delivers the viscosity and purity needed to keep your differential running smoothly in all conditions. This isn't just another generic RC oil—it's the result of rigorous development and testing by some of Europe's leading RC drivers who have refined the formula to perform flawlessly from the scorching heat of Spain to the rainy conditions of the United Kingdom.

Differential oil plays a critical role in your RC car's performance. It lubricates the gears inside your differential, reduces friction, minimises noise and vibration, and helps protect against wear. A quality diff oil can make the difference between a car that handles predictably and one that feels loose or unpredictable. The Fastrax Racing Pure Silicone Diff Oil 10000CST is specifically formulated to offer exceptional consistency across a wide range of temperatures and conditions, ensuring your RC car performs reliably whether you're racing competitively or enjoying casual driving sessions.

What sets this Fastrax oil apart is its purity and the level of tuning flexibility it offers. The range of available viscosities—including this 10000CST variant—allows RC drivers to fine-tune their differential behaviour for different track conditions, weather, and driving styles. The easy-pour lid design makes changing oil quick and hassle-free, transforming what could be a tedious maintenance task into just moments of work. If you're looking to join the winners' circle with your RC car UK setup, choosing Fastrax oils is a decision backed by professional racers and proven performance.

Key Features

• Pure Silicone Formula — This diff oil is manufactured from pure silicone, which means superior purity and consistency compared to blended or synthetic alternatives. Pure silicone oil doesn't degrade or break down as quickly as lower-quality formulations, ensuring your differential maintains optimal lubrication over extended use periods, whether you're running a brushless RC car or any other platform.
• 10000CST Viscosity — The 10000 centistoke viscosity rating indicates this is a very thick, heavy-duty oil suitable for differential work where maximum damping and protection is needed. This viscosity level is ideal for drivers seeking to reduce differential slippage, minimise rattle and noise, and add stability to their RC car's handling characteristics across varied track conditions.
• Rigorously Tested by European Professionals — This oil was developed over 12 months of intensive testing by some of Europe's leading RC drivers. These professional competitors tested the formula in extreme conditions ranging from the intense heat of Spain to the wet, unpredictable weather of the UK. This real-world validation means you're buying a product that has proven itself at the highest levels of RC racing competition.
• Exceptional Consistency and Progression Through the Range — Fastrax has developed an entire range of diff oils with careful progression between viscosity grades. Professional drivers involved in the testing were unanimous in stating they had never encountered oils offering such consistent performance and smooth progression through the available options. This means you can confidently step up or down in viscosity grades knowing each will perform predictably.
• Wide Tuning Options for All Conditions — The extensive range of Fastrax diff oil viscosities enables serious RC enthusiasts to precisely tune their cars for different conditions. Whether you're racing on a carpet track, foam track, or outdoor clay surface, and whether conditions are hot, cold, wet or dry, having the right differential oil viscosity allows you to optimise your RC car's handling, stability and performance.
• Easy-Pour Lid Design — The convenient closing cap and easy-pour design transforms differential oil changes from a frustrating, messy chore into a simple task that takes just moments. No more spilled oil, no more struggling with difficult caps—just quick, clean maintenance that keeps you on the track where it matters.
• Cleans and Eliminates Differential Rattle — Users report that this pure silicone oil is highly effective at eliminating the annoying rattle that can develop in differentials, while simultaneously cleaning out old oil residue and contaminants. A quieter, cleaner differential means better performance feedback and more enjoyable driving sessions.
• Professional Quality at Accessible Price — Despite being developed and tested by professional-level drivers and offering premium pure silicone construction, this Fastrax oil delivers exceptional value for money. You're getting genuine professional-grade RC differential lubricant without the premium price tag of some competing brands.

Technical Performance

The Fastrax Racing Pure Silicone Diff Oil 10000CST represents the pinnacle of differential lubrication technology for RC cars. At 10000 centistokes, this is a high-viscosity formula designed for drivers who prioritise differential damping, precision handling and the elimination of slippage. Pure silicone as the base material ensures maximum stability across temperature ranges and extended shelf life compared to synthetic blends. The 50ml bottle provides ample quantity for multiple differential fills and top-ups, making it economical for regular RC car maintenance. Professional-level testing in conditions ranging from Mediterranean heat to British rainfall has validated this oil's consistency in performance regardless of environmental factors. The molecular structure of pure silicone means minimal evaporation, minimal temperature-induced viscosity changes, and maximum protective film strength on differential gears. For RC cars ranging from 1/10 scale buggies to larger platforms, and whether powered by brushless or brushed motors, this differential oil maintains its characteristics and protective properties. The crystal-clear appearance means you can easily inspect the condition of the oil and know when maintenance is required. Users report that this oil successfully conditions older, worn differentials and prevents premature wear in new installations, making it suitable for both fresh builds and well-used RC vehicles.

What's in the Box

• Fastrax Racing Pure Silicone Diff Oil 10000CST 50ml bottle with easy-pour lid

Frequently Asked Questions

• What viscosity diff oil should I use for my RC car? — Differential oil viscosity depends on your track conditions, driving style and what you want from your car's handling. Thicker oils like this 10000CST variant provide more damping, reduce differential slippage and noise, and suit drivers wanting stable, predictable handling. Thinner oils offer quicker acceleration response. Start with the viscosity recommended by your vehicle manufacturer, then adjust based on your preferences and track conditions.
• Will this Fastrax diff oil work with my specific RC car model? — Yes, this pure silicone diff oil is compatible with any RC car that uses a differential, including Traxxas, ARRMA, Losi, Tamiya, HPI, Team Associated, Axial and other brands. Whether you're running a 1/10 scale buggy, monster truck, short course truck or larger platform, this oil can be used in your differential assembly. Always check your specific vehicle's manual for any oil type restrictions.
• How much oil do I need for one differential fill? — This depends on your specific differential design and fill level. Most RC car differentials require between 5ml and 15ml of oil per fill. The 50ml bottle provides enough for multiple fills and top-ups, making it economical over time. Consult your vehicle manual for the exact recommended fill volume.
• Why is pure silicone better than synthetic blend diff oils? — Pure silicone offers superior consistency, longer shelf life, minimal evaporation, and better temperature stability compared to synthetic blends. This means your differential maintains optimal lubrication for longer periods, requires less frequent maintenance, and performs consistently in hot, cold and wet conditions. Professional-level testing has confirmed that drivers notice better handling consistency and reduced performance variation when using pure silicone formulations.
• Will using this 10000CST oil slow down my RC car's acceleration? — Thicker differential oils do slightly increase rotational resistance, which can marginally reduce acceleration response. However, the improvement in handling stability, reduced slippage and elimination of differential noise typically provides a net benefit in competitive driving. If maximum acceleration is your priority, consider stepping down to a thinner viscosity grade from the Fastrax range, then adjust based on your track conditions and preferences.
• Is this suitable for beginners to RC hobbying? — Yes, absolutely. While this is a professional-grade product, differential maintenance is a fundamental part of RC car ownership regardless of experience level. Beginners benefit from understanding proper differential care, and this easy-to-use bottle with its convenient pouring lid makes the process straightforward. Start with your vehicle manufacturer's recommended viscosity, maintain regular oil changes, and you'll develop proper maintenance habits that improve your overall RC experience.
• How long does one 50ml bottle last? — The longevity depends on how frequently you use your RC car and how often you perform maintenance. Most RC enthusiasts performing regular differential maintenance can expect one 50ml bottle to last several months to a year of typical weekend use. Competitive racers who maintain vehicles weekly may consume oil faster and benefit from purchasing multiple bottles.
• What is the difference between this Fastrax oil and cheaper supermarket or hardware store oils? — Cheap, generic oils are often not specifically formulated for RC differential requirements and may contain additives that leave residue, cause varnishing, or break down under the specific operating conditions of RC differentials. Fastrax Racing Oil is specially developed by professional RC racers for RC applications, meaning it's optimised for the temperatures, pressures and speeds encountered in RC car differentials. The result is longer component life, more consistent performance, and better value despite the slightly higher initial cost.

Why Buy from RC Model Shop?

RC Model Shop is a trusted UK RC retailer and authorised dealer for all the brands we stock, including Traxxas, ARRMA, Losi, FTX, Hobbywing, Spektrum and more. Based in Walsall, we have a physical store where customers are welcome to come in, view products and purchase in store. Whether you are a seasoned competitor, a weekend basher, or just discovering the world of RC for the first time, our team of experienced RC enthusiasts is here to help you find the perfect setup and provide ongoing support. Order the Fastrax Racing Pure Silicone Diff Oil 10000CST FAST61-10K today with confidence, knowing you are buying from an authorised retailer with genuine products, expert knowledge and a commitment to customer satisfaction. Shop online or visit us in Walsall — we look forward to helping you get the most out of your RC experience.