CEN/TS 18227:2025

This document specifies requirements and test methods for E20 petrol marketed and delivered as such, containing a minimum oxygen content of 3,7 % (m/m) and a maximum of 8,0 % (m/m). The fuel has a maximum of 20,0 % (V/V) ethanol.
It is applicable to fuel for use in spark-ignition petrol-fuelled engines and vehicles.
This document is complementary to EN 228, which describes unleaded petrol containing an oxygen content up to 3,7 % (m/m) and a maximum ethanol content of 10 % (V/V).
NOTE 1 For general petrol engine vehicle warranty, E20 petrol might not be suitable for all vehicles and it is advised that the recommendations of the vehicle manufacturer are consulted before use. E20 petrol might need a validation step to confirm the compatibility of the fuel with the vehicle, which for some existing engines might still be needed.
NOTE 2 For the purposes of this document, the terms “% (m/m)” and “% (V/V)” are used to represent respectively the mass fraction, µ, and the volume fraction, f.