Overview
Team Associated's Silicone Shock Oil 42.5Wt (538cSt) is an essential maintenance fluid for serious RC car enthusiasts across the UK who demand precision tuning and reliable performance from their suspension systems. This premium silicone shock fluid, part number AS5434, is manufactured exclusively for Team Associated by Lucas Oil Products in the USA, ensuring you're getting a professional-grade product backed by decades of automotive fluid expertise. Whether you're competing at the track or bashing at the weekend, having the correct shock oil viscosity is absolutely critical to achieving the handling characteristics your RC car needs for optimal performance.
What sets this 42.5Wt shock oil apart from standard alternatives is its half-weight grade, which dramatically increases your tuning options without requiring you to mix different fluids together. For UK RC racers and hobbyists, this means faster setup iterations, more consistent results, and the ability to dial in your suspension precisely for different track conditions, weather patterns, and driving styles. No more guessing or spending hours blending oils at the workbench—simply reach for the correct weight and enjoy immediate, predictable damping performance.
The 2 fl. oz. bottle comes with a sealed insert design that prevents spills during transport, making it ideal for taking to race meetings, local clubs, or RC track days across the country. This is the shock fluid trusted by Team Associated factory drivers and used in countless race-winning builds worldwide.
Key Features
- 42.5Wt viscosity rating (538cSt) — This precise viscosity specification ensures your shocks respond consistently to suspension tuning adjustments, giving you the fine control needed for competitive RC driving and performance optimization.
- Half-weight grade for expanded tuning range — The 42.5Wt rating sits between standard weights, allowing you to dial in suspension feel without needing to mix fluids, which saves time and eliminates the risk of inconsistent oil blends affecting your setup repeatability.
- Made in USA by Lucas Oil Products — Manufactured exclusively for Team Associated by an industry-leading lubricant company, guaranteeing consistent quality, purity, and performance that meets the exacting standards of professional RC racing.
- Sealed spill-proof insert cap — The twist-to-open design with seal insert means you won't lose valuable oil through leaks or spills when transporting your shock fluid between home, your workshop, and the track.
- 2 fl. oz. bottle size — This convenient size provides enough fluid for multiple shock servicing sessions while remaining compact and easy to store in your pit box, tool bag, or workbench.
- Consistent viscosity delivery — Premium silicone formulation maintains stable damping characteristics across temperature ranges, ensuring your RC car's suspension performs reliably whether you're driving in summer heat or cooler conditions.
- Professional-grade formulation — This is the same fluid specification used in Team Associated factory team vehicles and competition-grade builds, meaning you're using exactly what the experts rely on for race-winning performance.
Technical Performance
The 42.5Wt (538cSt) silicone shock oil represents a critical component in modern RC suspension tuning strategy. Silicone-based formulations offer superior consistency compared to mineral oils, with minimal viscosity variation across the temperature ranges you'll encounter during an RC racing session. The 538 centistoke rating at 40°C provides the precise damping characteristics needed for 1/10-scale touring cars, buggies, short-course trucks, and other Team Associated platforms. This viscosity allows shocks to absorb impacts with the right balance of resistance and flow, preventing both under-damping (bouncy, unpredictable handling) and over-damping (stiff, unresponsive suspension). The half-weight classification makes this fluid particularly valuable for intermediate tuning adjustments—you can move from a lighter oil to 42.5Wt without jumping the full weight increment to standard 45Wt, giving you the granular control that separates competitive setups from average ones. The premium formulation maintains its viscosity stability across multiple heat cycles, ensuring that your shocks perform the same way lap after lap, run after run. For RC enthusiasts in the UK using Team Associated vehicles ranging from classic models like the RC10 through modern platforms like the Apex2, RC8B4, Reflex, and Enduro series, this shock oil is engineered to meet the demanding requirements of both on-road and off-road racing.
What's in the Box
- Team Associated FT Silicone Shock Fluid 42.5wt (538cSt) — 2 fl. oz. bottle with sealed insert cap
Compatibility and Applications
This 42.5Wt silicone shock oil is compatible with an extensive range of Team Associated RC vehicles, including touring cars, buggies, short-course trucks, monster trucks, crawlers, and specialty models. Compatible platforms include the RC10 series (RC10DS, RC10T, RC10T4.2, RC10T4.3, RC10T5M, RC10T6.1, RC10T6.2, RC10T6.4), the RC10B series (RC10B44.1, RC10B44.2, RC10B4.2, RC10B5, RC10B5M, RC10B6, RC10B6.1, RC10B6.2, RC10B6.3, RC10B6.4, RC10B74, RC10B74.1, RC10B74.2, RC10B7), the SC10 range (SC10GT, SC10B, SC10.2, SC10.3, ProSC 4x4, ProSC10, Pro4 SC10, Pro2 SC10), the TC series (TC6.2, TC7, TC7.1, TC7.2), the RC8 platform (RC8.2, RC8.2e, RC8B3, RC8B3.1, RC8B3.2, RC8B3e, RC8T3, RC8T3.1, RC8T3.2, RC8T4, RC8B4, RC8B4.1, RC8B4e, RC8B4.1e), Apex models, Reflex vehicles, Enduro off-road trucks, Monster trucks (MT12, Rival series), and many more. Team Associated recommends consulting the detailed fluid chart available for your specific model to confirm the correct shock oil weight for your suspension setup and driving conditions.
Frequently Asked Questions
- What is the difference between shock oil weights and why does it matter for my RC car? — Shock oil viscosity directly controls how quickly fluid flows through your shock absorbers' internal passages. Thicker (heavier) oils provide more damping resistance, slowing the shock's compression and extension for a stiffer, more controlled feel—useful for high-speed tracks and smooth surfaces. Thinner (lighter) oils allow faster flow and quicker shock response, improving bump absorption and traction on rough or technical terrain. The 42.5Wt rating sits in the mid-range, making it ideal for versatile driving conditions and as a tuning step between standard weights. Choosing the correct weight for your track conditions, driving style, and specific RC car model is one of the most impactful suspension adjustments you can make.
- Why should I use Team Associated genuine shock oil instead of cheaper alternatives? — Genuine Team Associated shock oil, manufactured by Lucas Oil Products, undergoes rigorous quality control to maintain consistent viscosity, purity, and performance. Budget alternatives may vary in viscosity from bottle to bottle, leading to unpredictable handling that makes it impossible to develop a repeatable setup. When you're investing hundreds of pounds in your RC car, spending a few extra pounds on premium shock fluid is a worthwhile investment in reliability and performance consistency. Professional racers and factory teams use genuine fluids because they deliver the predictability needed to win races.
- Can I mix different shock oil weights together? — Technically you can blend oils to achieve intermediate viscosities, but it's not recommended for serious RC racing. Mixing introduces variables that make it difficult to achieve consistent results, and you lose track of your exact setup specifications. This is precisely why Team Associated offers half-weight grades like this 42.5Wt fluid—it eliminates the need to mix while giving you the tuning range you need. For competitive driving, always use single-weight oils from the same manufacturer to ensure repeatability.
- How often should I change my shock oil? — Shock oil should be changed whenever you service your shocks, which typically occurs every 3-6 months for regular racers, more frequently for serious competitors. You should also change oil if you notice your shocks feeling less responsive than usual, if you've been racing in wet or dusty conditions that may have contaminated the fluid, or if you're making major suspension tuning changes. Always use fresh oil when rebuilding or servicing shock cartridges to ensure optimal performance and prevent internal wear.
- Is this 42.5Wt oil suitable for my Team Associated RC car? — This fluid is compatible with dozens of Team Associated models across touring cars, buggies, trucks, and crawlers. However, the ideal shock oil weight depends on your specific vehicle, driving environment, and setup preferences. Team Associated provides a detailed fluid chart showing recommended weights for each model and condition. We recommend consulting your vehicle's manual or the official fluid compatibility chart before selecting your shock oil weight. If you're uncertain, our team at RC Model Shop can provide expert recommendations based on your specific RC car and intended use.
- What makes silicone shock oil better than mineral oil? — Silicone-based shock oils offer superior viscosity stability across temperature changes, meaning your shocks perform consistently whether conditions are hot or cold. Silicone also resists oxidation better than mineral oils, extending the time you can safely use the same fluid before it degrades. Additionally, silicone formulations typically provide better thermal stability under the intense heat generated by racing sessions, maintaining their damping characteristics throughout your run. For serious RC racing where consistency and performance are paramount, silicone is the preferred choice of professionals worldwide.
- How do I know if my shock oil needs changing? — Signs that your shock fluid needs replacement include discolouration (turning brown or black), visible contamination or particles, a change in how your shocks feel (becoming either too stiff or too soft unexpectedly), or if you've been racing in particularly wet or dusty conditions that may have introduced contaminants. Additionally, if you haven't serviced your shocks in 6 months or more, it's good practice to refresh the fluid as part of regular maintenance. Always inspect your shock cartridges when servicing and replace the oil if it appears degraded.
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 Team Associated, 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 Team Associated Silicone Shock Oil 42.5Wt (538Cst) AS5434 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.
