Overview
The Fastrax Racing Pure Silicone Diff Oil 7000CST is a premium differential lubricant designed for serious RC enthusiasts and competitive drivers across the UK. Whether you're running a high-performance RC buggy, truck, or crawler, maintaining the correct differential fluid is essential for consistent handling, durability, and race-winning performance. This 7000 centistoke (cSt) oil represents the thicker end of the viscosity spectrum, making it ideal for drivers seeking maximum diff protection and controlled torque delivery in demanding conditions.
Developed over 12 months of rigorous testing by some of Europe's leading RC drivers, this Fastrax oil has been proven in extreme conditions ranging from the scorching heat of Spain to the challenging wet weather of the UK. The testing protocol ensures you're getting a product that delivers exceptional consistency and performance across all seasons and environments. Every bottle is formulated to maintain its viscosity and protective properties whether you're bashing hard in the cold British autumn or pushing your car to the limit in summer heat.
If you're serious about RC car performance and want to join the winners' circle, Fastrax oils offer the precision tuning capability that competitive drivers demand. The easy pour lid design means you can change your differential oil quickly and cleanly, without the mess and frustration that comes with inferior containers. This is the choice of European champions and experienced hobbyists alike who refuse to compromise on their RC car setup.
Key Features
- Pure Silicone Formula — Manufactured from 100% pure silicone, this oil provides superior lubrication properties and maintains its viscosity consistency over extended use, ensuring your differentials remain protected lap after lap and bash after bash.
- 7000cSt Viscosity Rating — The 7000 centistoke rating makes this oil among the thickest in the Fastrax range, ideal for drivers seeking maximum diff locking effect and controlled power delivery in demanding racing conditions or extreme bashing scenarios.
- Championship-Tested Formula — Developed and validated by some of Europe's leading RC drivers, this oil has been tested in real-world competitive conditions and proven to deliver consistency that rivals have never matched.
- Year-Round Performance — Testing conducted across diverse climates from the heat of Spain to the rain of the UK confirms this oil maintains optimal performance in hot weather, cold weather, and wet conditions, giving you true consistency across all seasons.
- Comprehensive Range Options — Fastrax offers an extensive selection of viscosity grades, enabling you to tune your differential response for specific track conditions, weather, and driving style with precision normally associated with professional racing operations.
- Easy Pour Lid Design — The innovative bottle design features an easy pour lid that transforms oil changes from a tedious chore into a quick, clean operation, minimising spillage and getting you back on track faster.
- Professional-Grade Consistency — Drivers in the testing programme reported they had never encountered oils offering such consistency and smooth progression across the entire viscosity range, making tuning and setup changes predictable and reliable.
Technical Performance
The Fastrax Racing Pure Silicone Diff Oil 7000CST delivers professional-grade differential lubrication in a 50ml bottle, making it perfect for regular maintenance on your RC car or truck. At 7000 centistokes, this is a heavy-duty formulation suited to drivers who want maximum differential control and reduced slippage in demanding conditions. Pure silicone construction ensures the oil resists breakdown under the intense friction and temperature variations found inside modern RC differentials. This viscosity grade is particularly effective for high-performance buggies, trucks, and specialist vehicles where differential tuning plays a critical role in lap times and handling characteristics. The formulation has been validated through extensive competitive testing, meaning the oil you're purchasing has already proven itself in actual racing environments against demanding European competitors. Whether you're running a Hyper 7 Virus, LRP, or other quality RC platform, this oil will deliver the protection and performance characteristics you need. The consistent viscosity profile means you can rely on the same differential response from the first run to the hundredth, supporting your setup tuning efforts with genuine reliability.
What's in the Box
- 1x 50ml bottle of Fastrax Racing Pure Silicone Diff Oil 7000CST
- Easy pour lid cap for mess-free application
Frequently Asked Questions
- What viscosity rating should I choose for my RC car? — Viscosity selection depends on your vehicle type, driving style, and track conditions. The 7000cSt rating is among the thickest available in the Fastrax range, offering maximum differential locking effect and control for drivers seeking to reduce wheel spin and stabilise power delivery. Lower viscosity oils (like 1000cSt or 2000cSt) provide less resistance and are better for loose conditions or stock vehicles, whilst heavier oils like this 7000cSt option are preferred for competition buggies and trucks where precise differential tuning is critical. Fastrax offers numerous options across the full spectrum, allowing you to select the exact oil that matches your specific requirements.
- Is Fastrax diff oil suitable for racing and competition use? — Absolutely. This oil was specifically developed by some of Europe's leading RC racing drivers over 12 months of rigorous testing in competitive environments. It's designed for serious drivers who want championship-level performance and has been proven in actual racing conditions at the highest amateur levels. If you're competing at club level or looking to improve your lap times, this is a professional-grade product that will support your efforts.
- How often should I change my differential oil? — Differential oil should be inspected regularly and changed whenever it becomes discoloured, loses viscosity, or shows signs of contamination from dirt or metal particles. For casual bashers, this might be every few months, whilst competitive drivers might change oil more frequently—sometimes between race meetings. Always check your vehicle manufacturer's recommendations, but regular maintenance ensures your differentials remain protected and perform consistently.
- Does this oil work in all RC vehicles? — This is a universal differential oil suitable for any RC car, truck, buggy, or specialist vehicle with a slipper clutch or differential. It works equally well in Hyper vehicles, LRP models, Traxxas trucks, Losi buggies, and countless other platforms. However, you should always verify your specific vehicle's differential type and capacity before ordering, and ensure you're selecting the correct viscosity for your intended use.
- Why is the bottle only 50ml if I need to top up frequently? — The 50ml bottle size is actually quite generous for a single oil top-up or complete differential fluid change on most RC vehicles. Many models require between 10-20ml of oil, meaning a single bottle often covers multiple applications. If you're a regular competitor or serious basher, purchasing multiple bottles alongside other upgrades is a practical approach to keeping your differential maintained throughout the season.
- What makes this oil different from cheaper alternatives? — This Fastrax oil has been tested and validated by professional European RC drivers in actual competition and extreme weather conditions. The consistency and performance progression across the entire viscosity range is significantly superior to basic oils, as confirmed by drivers involved in the development programme. You're paying for proven reliability, championship testing, and the confidence that comes with using a product trusted at the highest levels of RC racing.
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 7000CST FAST61-7K 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.
- Brand: Fastrax
- Model Number: FAST61-7K
- Product Type: Pure Silicone Differential Oil
- Viscosity Rating: 7000 centistokes (cSt)
- Bottle Size: 50ml
- EAN Code: 5055323904387
- Formulation: 100% Pure Silicone
- Development: Tested by European leading RC drivers over 12 months
- Testing Conditions: Extreme heat (Spain) to wet weather (UK)
- Key Benefit: Maximum consistency and progression across viscosity range
- Application: Universal RC differential oil for buggies, trucks, crawlers and specialist vehicles
- Bottle Feature: Easy pour lid for clean, mess-free application
- Stock Status: In stock
We want to make sure your delivery goes smoothly, so here are some important details about our service:
- For orders above £120, we offer delivery to most mainland UK addresses. For orders under £120, we can still deliver to Northern Ireland and the outlying isles, as long as the item can be sent by Royal Mail, weighs less than 30kg, and fits within 61cm × 46cm × 46cm. Some highland and remote areas may carry an extra delivery charge as couriers often apply surcharges in these locations. If you live in one of these areas, feel free to contact us before ordering so we can confirm the delivery options and costs for you.
- Most of our products include delivery in the price. If your order is under £90, a small delivery fee will apply but do not worry this will always be clearly shown at checkout before you complete your purchase.
- Depending on what you choose at checkout, your order will usually be delivered either the next working day or within 2 working days. For next day delivery please place your order before 2:00pm. Orders are dispatched Monday to Friday only. Some items may take a little longer and if that is the case we will always show the expected delivery time on the product page.
- If your order includes items with different dispatch times we will normally wait and send everything together once all items are in stock. If one of the items is going to take a while we will give you the choice either wait for everything to arrive or let us send the available items now and deliver the rest later. It is up to you.
- We use trusted delivery partners to make sure your order gets to you safely and on time. We use DPD for next working day deliveries and Royal Mail for the 2 day option.
- As soon as your order is on its way we will send you a tracking number by email. If you provide your mobile number at checkout we will also send delivery updates straight to your phone so you can keep an eye on progress.
- If a product is marked as "Dispatched within 3 working days" delivery usually takes around 3 to 5 working days from when your order is placed.
- For customers in Inverness and other parts of the Scottish Highlands deliveries can take up to 2 working days even if you select next day delivery as couriers do not currently offer a guaranteed next day service to those areas.
