Traxxas Differential Oil 500K Weight 20cc Bottle TRX5039

Overview

The Traxxas Oil, Differential (500K wt) TRX5039 is a premium-grade differential lubricant designed specifically for RC car enthusiasts across the UK who demand precision performance from their gear differentials. Whether you're running a Traxxas Slash 2WD, a high-performance buggy, or any RC vehicle with a limited-slip differential, this specialist oil gives you complete control over your vehicle's handling characteristics and turning performance. Unlike generic lubricants, Traxxas differential oils are engineered to provide consistent, predictable performance across varying track conditions, making them an essential part of any serious RC racer's or weekend basher's toolkit.

This 500K weight formulation represents a mid-range viscosity option within the Traxxas differential oil range, allowing you to fine-tune your vehicle's limited-slip capability to match your specific driving style and track conditions. The beauty of Traxxas performance diff lubes is their ability to be easily swapped or mixed to increase or decrease the limited-slip action of your gear differential, giving you granular control over how your vehicle turns and how quickly it exits corners. For RC car enthusiasts in the UK looking to optimise their setup without major component changes, differential oil adjustment is one of the most cost-effective tuning methods available.

Supplied in a convenient 20cc bottle, the TRX5039 is the ideal choice for maintenance, initial filling, or experimenting with different viscosity weights to dial in your perfect setup. Many UK RC drivers report that factory-filled differentials often contain suboptimal lubricants—sometimes even lithium grease that compromises performance. Upgrading to genuine Traxxas differential oil transforms how your vehicle handles, providing smoother engagement, reduced binding, and more responsive cornering characteristics that will immediately make a noticeable difference whether you're racing competitively or enjoying casual track days.

Key Features

• 500K Weight Viscosity — This mid-range oil weight provides a balanced level of limited-slip action suitable for most track conditions and driving styles, making it an excellent starting point for drivers experimenting with differential tuning or replacing factory fills that may have degraded over time.
• Performance-Grade Formulation — Traxxas differential oils are specifically engineered for RC applications, ensuring consistent viscosity across temperature ranges and maintaining optimal performance whether you're running in cool UK winter conditions or warmer summer months.
• Easy Tuning Capability — By adjusting the weight of oil in your differential, you can enhance turning performance for faster exit speeds and more responsive cornering without requiring expensive component changes or extensive technical knowledge.
• 20cc Convenient Bottle — The compact 20cc format is perfect for differential maintenance, initial filling, or keeping in your pit bag for adjustments between races or practice sessions at your local RC track.
• Direct Compatibility — Formulated to work seamlessly with all Traxxas differentials and compatible with most aftermarket gear diffs, ensuring you can confidently use this oil across your entire fleet of RC vehicles.
• Track-Proven Formula — Used by competitive RC racers and weekend enthusiasts alike across the UK RC scene, this oil has been tested extensively in real-world conditions and delivers the predictable performance serious drivers demand.

Technical Performance

The Traxxas Differential Oil 500K weight is formulated using advanced lubrication chemistry that delivers superior performance compared to standard multipurpose greases or homemade solutions. The 500K weight classification refers to the oil's viscosity—thicker than lighter 200K or 300K weights but more fluid than heavier 1000K or 2000K options. This viscosity rating directly affects how much limited-slip action your differential provides: heavier oils create more friction between the gears, increasing the locking effect and making the vehicle turn tighter with better weight transfer during cornering; lighter oils provide less friction, allowing the wheels to slip more freely and making the vehicle turn more gradually with less aggressive handling. The formulation resists degradation from the heat and mechanical stress generated within the differential, maintaining consistent performance throughout an entire race day or extended bashing session. Users report the oil has a thick, jam-like consistency that clings to differential components effectively, ensuring proper lubrication even during aggressive driving where centrifugal forces might throw lighter lubricants away from critical contact points. The oil's stability makes it suitable for the full range of UK track conditions, from dry summer days at indoor carpet tracks to damp conditions at outdoor racing venues. Its engineered composition ensures it won't separate or break down under the extreme pressures generated by spur-gear mesh, maintaining optimal protection for expensive differential gears and ensuring your RC car remains reliable season after season.

What's in the Box

• 20cc bottle of Traxxas Differential Oil, 500K weight (TRX5039)

Frequently Asked Questions

• What weight of differential oil should I use for my RC car? — The correct weight depends on your track conditions and driving style. Lighter oils like 200K provide less resistance and more sliding, making vehicles turn more gradually and are ideal for carpet tracks. The 500K weight offers a balanced middle ground suitable for most conditions. Heavier oils like 1000K or 2000K create tighter turns with more locking action, better for loose outdoor surfaces or drivers preferring aggressive handling. Many racers keep several weights on hand and adjust based on conditions.
• How do I know if I need to change my differential oil? — Factory-filled differentials often contain suboptimal lubricants that may look like lithium grease rather than proper oil. If your vehicle doesn't turn as smoothly as expected or feels sluggish coming out of corners, upgrading to Traxxas differential oil can make an immediate difference. Over time, differential oil can degrade from heat and contamination, so refreshing it annually or every 20-30 hours of driving maintains peak performance.
• Is this suitable for beginners? — Absolutely. Differential oil tuning is one of the most accessible and effective modifications beginners can make without requiring technical expertise. Simply drain old lubricant and add fresh Traxxas oil following your vehicle's manual. Beginners should start with a mid-range weight like this 500K option and experiment from there.
• Can I mix different weight oils together? — Yes, mixing different weights allows fine-tuning between standard weights. For example, mixing 500K with 1000K creates a weight between the two, giving you customisation options. This flexibility is one of the advantages of using separate weight bottles rather than pre-filled differentials.
• What is the difference between differential oil weights? — The weight number refers to viscosity. Lower numbers (200K, 300K) are thinner and provide less limited-slip locking, resulting in looser handling. The 500K weight sits in the middle. Higher numbers (1000K, 2000K) are thicker and provide more locking action, creating tighter turns. Think of it like choosing brake pads—different compounds for different conditions, except with oil you change properties without buying new parts.
• Will this work in my non-Traxxas RC vehicle? — Traxxas differential oil is compatible with most aftermarket gear differentials used in RC cars. However, always check your vehicle's manual to confirm it uses a gear differential rather than a slipper clutch or other system. If your car has a gear differential, this oil will work.
• How much oil do I need? — The 20cc bottle is typically sufficient for one complete differential fill on most 1/10-scale RC vehicles, or for multiple top-ups and experiments. Check your vehicle's manual for exact capacity, though most standard differentials hold between 3-5cc of lubricant.

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 Traxxas Oil, Differential (500K wt) TRX5039 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.