Choosing the right race fuel is crucial for optimising performance as well as ensuring your engine can run safely. It can be a bit daunting when first considering race fuel as there are many options available, so to make things easier, here is our official guide to help you in making the right decision when considering any of our VP race fuel

1. Understanding Fuel Types: 

• Pump Fuels: This fuel is readily available throughout Ireland, it is often lower in octane with a rating of around 95 RON, making it more suitable for lower-performance applications. Pump fuel can vary from batch to batch, station to station which means the performance is never consistent. 

• Racing Fuels: Our VP fuel drums are higher in their octane rating, and range anywhere from 102 to 120 octane. Designed for performance engines and available at our store to purchase. You can purchase most fuels in 19, 53 and 204 litre drums at our shop. 

• Alcohol Fuels (Methanol, Ethanol etc): Also available at our store. Higher octane ratings and they also burn cooler in their formulation, but please note they require specific tuning and components to run them effectively so a bit more digging is needed when considering alcohol-based fuels! 

2. Octane Rating simplified:

• Higher Octane: This allows for higher compression ratios and advanced ignition timing, which in turn will reduce the risk of knock (pre-detonation). 

• Recommended Octane: Check your engine’s specifications to determine the minimum octane rating required for optimal performance. We also have VP information booklets which you can find at our shop to determine which fuel would be best for your application! 

3. Fuel Composition:

• Leaded vs. Unleaded: Most modern engines require unleaded fuel. If you’re racing a vintage car, you might need leaded fuel. 

• Additives: Some racing fuels contain specific additives for improved performance and protection against engine wear such as the VP Ethanol shield additive. We also stock octane boosters which can be mixed with regular 95 pump fuel to boost your octane rating. 

4. Engine Requirements and Tuning:

• Tuning: Ensure that your engine is tuned for the fuel you decide on buying. Swapping fuels may require a re-tune for optimal performance and mixing fuel or not specifically mapping your car to a certain type of fuel can have knock on effects and can likely damage your engine internals. 

• Fuel System Compatibility: Check that your fuel system components such as the lines, filters, injectors etc. are all compatible with your chosen fuel, especially with alcohol-based fuels! 

5. Storage and Handling

• Proper Storage: Store fuel in appropriate containers in a cool, dry place, and it is also important to be mindful of safety regulations. 
• Fuel Stability: Some racing fuels have a shorter shelf life; once opened use them within recommended timeframes. 

Popular Unleaded Fuels 

1) RX102 (FIA Compliant) Designed for competitive racing, including circuit racing, drag racing and off-road events.

2) R5.1 (FIA Compliant)  Ideal for modified or high-output engines that require specific fuel properties to achieve optimal performance.

3) MS109 Suitable for road racing and track events, where high-output engines are used that require superior fuel quality to maximize power.

4) Q16 Ideal for high-compression and boosted applications, helping to prevent detonation and improve power.

5) MR12 Excellent for tuning applications where precise control over combustion and performance is critical.

Popular Leaded Fuels 

• C12 

Popular Alcohol Fuels 

• C85 

Popular Additives 

1) Octanium Leaded or Octanium Unleaded 

2) Fuel Stabiliser with ethanol shield

Conclusion 

Choosing the right race fuel involves understanding your engine’s requirements, considering environmental factors, and testing different options. Take your time to research and experiment to find the best fuel for your racing needs! Call into us anytime for more information on this topic, and we look forward to seeing you instore. 

Written by Tiernan Fahey