Fastrax Racing Pure Silicone Diff Oil 4000CST FAST61-4K

Overview

The Fastrax Racing Pure Silicone Diff Oil 4000CST is a professional-grade differential oil engineered for precision RC car tuning and optimal performance across diverse racing conditions. This premium product represents the culmination of twelve months of rigorous testing and development by some of Europe's leading RC drivers, making it an essential choice for anyone serious about RC car UK performance. Whether you're competing in organised races, enjoying weekend bashing sessions, or fine-tuning your ready to run RC car setup, this silicone-based differential oil delivers the consistency and reliability needed to extract maximum performance from your vehicle's drivetrain.

Developed through extensive field testing conducted across vastly different climates—from the intense heat of Spain to the challenging rain and variable conditions of the UK—this oil has been proven to maintain exceptional consistency across a wide range of environmental conditions. The drivers involved in the development process unanimously praised these new Fastrax oils, noting that they have never encountered products offering such a high degree of consistency and smooth progression through the viscosity range. This means you can confidently select the right oil weight for your specific driving conditions and terrain, knowing that performance will remain predictable and reliable whether you're driving in summer heat or winter rain.

The engineering behind Fastrax Racing oils focuses on delivering professional-level consistency that helps drivers achieve the winning circle. By choosing Fastrax, you're investing in a product that has been battle-tested at the highest levels of RC motorsport and proven in real-world conditions across Europe.

Key Features

• Pure Silicone Formulation — The use of pure silicone means this differential oil provides superior stability and consistency across varying temperatures, ensuring your differential operates smoothly whether you're racing in summer heat or winter conditions typical of UK weather.
• 4000 Centistoke Viscosity Rating — With a 4000cST viscosity rating, this oil is designed for specific differential tuning requirements, allowing drivers to fine-tune their RC car's handling characteristics and differential lock-up behaviour for optimised performance on various track surfaces and terrain types.
• Extensively Tested by Professional Drivers — This oil has undergone twelve months of rigorous testing by some of Europe's leading RC drivers, ensuring that it meets the highest standards of performance and reliability expected by competitive racers and serious enthusiasts.
• Tested in Diverse Conditions — Testing has been conducted from the heat of Spain to the rain of the UK, providing comprehensive real-world validation across multiple climates and environmental conditions that cover virtually all scenarios you'll encounter as an RC car enthusiast.
• Exceptional Consistency and Progression — Professional drivers consistently report that these Fastrax oils offer more consistency and smoother progression through the range than any comparable products on the market, making oil selection and vehicle tuning more predictable and effective.
• Vast Range of Viscosity Options — The comprehensive range of available viscosity weights enables you to precisely tune your RC car for all conditions, from specific track characteristics to seasonal weather changes and different driving styles.
• Easy-Pour Lid Design — The convenient easy-pour lid makes changing and refilling your differential oil quick and straightforward, transforming oil changes from a time-consuming chore into a moment's work, keeping you on the track rather than in the workshop.
• Professional-Grade Performance — Engineered for competitive racers and serious hobbyists who demand the highest levels of performance and consistency from their RC car components and consumables.

Technical Performance

The Fastrax Racing Pure Silicone Diff Oil 4000CST delivers professional-grade technical performance through its carefully formulated pure silicone composition. The 4000 centistoke viscosity rating places this oil in the medium-high range of differential oil options, making it suitable for drivers seeking to optimise differential lock-up characteristics and handling response in their RC cars. The pure silicone formulation ensures thermal stability across the wide temperature ranges experienced during competitive racing and recreational driving, whether you're pushing your RC car to the limit in summer conditions or dealing with the cooler temperatures of winter racing across the UK. This oil has been validated through extensive field testing by professional-level drivers who have subjected it to demanding conditions ranging from high-temperature Spanish racing venues to the variable wet conditions common to UK driving. The formulation maintains consistent viscosity characteristics that allow drivers to achieve predictable differential behaviour, translating to improved handling consistency and more reliable performance during critical racing moments. The engineering philosophy emphasises delivering oils that don't just meet specifications but exceed driver expectations for performance and reliability, making this product a trusted choice for serious RC car competitors and dedicated hobbyists seeking to extract maximum performance from their vehicles.

What's in the Box

• Fastrax Racing Pure Silicone Diff Oil 4000CST bottle with easy-pour lid

Frequently Asked Questions

• What does the 4000CST viscosity rating mean for my RC car? — CST stands for centistoke, which measures oil viscosity or thickness. The 4000CST rating indicates this is a medium-high viscosity oil designed for differential tuning. A higher viscosity creates more differential lock-up and affects how your RC car's drivetrain responds during acceleration and cornering. This particular weight is suitable for drivers seeking a specific balance of differential response and is part of Fastrax's comprehensive range that allows fine-tuning for different track conditions and driving styles.
• Is pure silicone oil better than other types of differential oil? — Pure silicone differential oils offer superior thermal stability and consistency across varying temperatures compared to many alternative formulations. This means the oil maintains its performance characteristics whether you're driving in hot summer conditions or cooler UK winter weather. The pure silicone formulation in this Fastrax product has been extensively tested and proven to deliver the consistency that professional drivers demand.
• How do I know which viscosity of Fastrax oil is right for my RC car? — The Fastrax Racing range includes many different viscosity options to suit various conditions and preferences. The 4000CST weight is positioned in the medium-high range, making it suitable for drivers who want more differential engagement and control. Your choice between different weights should be based on your specific track surface, weather conditions, and how much differential lock-up you prefer. Testing different weights across Fastrax's comprehensive range allows you to find the perfect match for your setup.
• Can I use this oil in extreme UK weather conditions? — Yes. The pure silicone formulation has been specifically tested in diverse conditions including the rain and variable temperatures typical of UK weather. The testing programme covered everything from Spanish heat to UK rain, ensuring that this oil maintains consistency and performance across the full spectrum of conditions you're likely to encounter as a UK-based RC enthusiast.
• Is this suitable for beginners or competitive drivers only? — While this professional-grade oil has been developed and tested by Europe's leading drivers, it is suitable for any RC car enthusiast who wants to optimise their vehicle's performance. Beginners can benefit from starting with a standard viscosity, whilst experienced drivers and competitors can use the extensive range of options for advanced tuning. The easy-pour lid makes this product accessible to users of all skill levels.
• Why is an easy-pour lid important? — Changing differential oil is a regular maintenance task for RC car enthusiasts. The easy-pour lid design means you can quickly and easily refill your differential without spilling, mess, or frustration. This convenience keeps you focused on driving and tuning rather than struggling with oil changes, allowing you to spend more time on the track and less time in the workshop.

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 4000CST FAST61-4K 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.