CHAPTER 8 PERMITTED FUELS AND TYRES AND TESTING Appendix 1- Permitted Fuels
1.1. Use Permitted Fuel( see definition below at Art. 1.7 and Chapter 1 App. 1 Nomenclature and Definitions) except, subject to prior written authority having been given by the ASN, where permitted otherwise under Official Documents
1.2. If using LPG, the entire system must conform with Construction and Use Regulations and LPG Industry Technical Association Code of Practice No. 11.
1.3. If using Methanol have a 3-inch diameter‘ Day- Glo’ orange disc affixed immediately adjacent to the Competition Numbers on both sides.
1.4. Any Vehicle using methanol must include an ASN approved additive which provides a distinguishable colour and smell when burning. The maximum permitted volume of additive within the fuel is 0.2 %.
1.5. All Vehicles competing in British and ASN Titled Championships for, and all new build Vehicles from 01 January 2013 for, Rallycross, Car Racing, Special Stage Rallying, Sprints and Hill Climbs( with the exception of Vehicles competing in Sprint and Hill Climb Standard Car and road car categories) must be equipped with the facility to enable a fuel sample to be taken. For fuel injected Vehicles the facility must be a dry break fuel sampling coupling, approved by the FIA, Competitors must carry and make available a 300mm minimum length of hose to which, where necessary, the appropriate mating part is to be attached.
1.6. All Vehicles must have sufficient fuel in the Vehicle fuel tank for a fuel test( App. 2) present at any time during the Event.
1.7. The definition of‘ Permitted Fuel’ is as follows:
NOTE: The ASN reserves the right to amend these details to reflect any change occurring in the quality of fuel on general sale to the public in the UK.
Also refer to Specifications Table below. Petrol: Commercially available gasoline
a. BS EN 228( unleaded and super-unleaded).
Unless otherwise stated or the distinction is made between leaded and unleaded petrol, the motor gasoline fuel shall meet the following:
i.
ii.
Acceptance levels for Octane Numbers will be accepted or rejected according to the Standard ASTM D. 3244. Only additives to this Motor Gasoline Fuel solely for the purpose of lead replacement are allowed.
LRG( unleaded), Lead replacement gasoline( LRG also known as LRP): Only additives to unleaded motor gasoline, solely for the purpose of lead replacement, from Sodium, Phosphorous or Manganese are allowed, subject to application according to manufacturer’ s instructions and to the treated fuel complying with the Specifications Table at Article 1.8 of this Chapter.
Lead in excess of EU Directive 98 / 70 EC requirements is illegal. This also applies to‘ Free Fuel’.
The addition of a lubricant on current sale is permitted in fuels for use in 2-stroke engines.
For rotary engines, a 2-stroke oil with a minimum viscosity of 5 cSt at 100 ° C, may be added at a maximum concentration of 0.30 %( mixing ratio of 300:1).
Motorsport UK 2025 National Competition Rules Version 11
Chapter 8 Appendix 1- Permitted Fuels 319