Fuel Dosing Guide (best viewed on large screen)
Work out the effect of adding Renegade race fuel or octane boosters to your pump fuel. Select your base fuel, choose your product, and see the resulting octane with clear guidance on whether a retune is recommended.
The benefits of blending race fuel with pump fuel go beyond the headline RON number. Renegade race fuels deliver faster, more complete combustion, improved knock and detonation resistance, reduced exhaust gas temperatures under load, and improved efficiency at a given power level. The result is more predictable, repeatable performance with greater engine protection.
Add 1 can of your chosen product to the stated litres of pump fuel.
Chemical additives, not fuel blends. Figures derived from manufacturer dosing data, converted to approximate UK RON. AKI shown for reference.
RON figures for boosters are approximate, derived from manufacturer AKI/MON data. Have test data? Email racefuel@birchperformance.co.uk
UK retailers publish RON but little else. Best available data below.
| Spec | 99 Super (E5) | 97 Super (E5) | 95 Std (E10) |
|---|---|---|---|
| RON | 99 Published | 97 Published | 95 Published |
| MON | 87 Est. | 86 Est. | 85 EN 228 min. |
| AKI | 93.0 Est. | 91.5 Est. | 90.0 Est. |
| Ethanol | Up to 5% (E5) | Up to 5% (E5) | Up to 10% (E10) |
| Oxygen | ~2.0% Est. | ~2.0% Est. | ~3.5% Est. |
| Examples | Tesco Momentum | BP Ultimate | All standard pump |
Why no MON? No legal requirement. EN 228 mandates MON 85 min. Our estimates use typical sensitivity of 8-12 points. UK fuel may be 1-2 MON points better than shown.
Think our estimates are wrong? Message racefuel@birchperformance.co.uk - we credit contributors.
Race fuel blends: linear volumetric weighted average with +1 RON leaded correction at 1:3-1:10. Boosters: power-curve scaling from manufacturer data. Zones: green up to 102 RON, amber 102-104, red above 104, with oxygen/SG checks. Grey below 0.8 RON uplift. All figures indicative, not laboratory-verified.
Important: Reference only. Pump fuel varies by retailer, region and season. User responsibility to ensure correct vehicle operation. Consult a tuner if in doubt.
Leaded fuels will damage catalytic converters and may affect O2 sensors.
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Renegade Race Fuel - official UK distribution