This Technical Report describes a study executed to evaluate the performance of representative vehicles of current and recent production when operating on petrol fuels containing up to 10 % (V/V) ethanol. Vehicle performance evaluations included regulated and evaporative emissions as well as hot and cold weather driveability. The testing procedures used in each of the three main vehicle studies were adapted to the requirements of the testing facilities.

The studies were designed to demonstrate whether a relaxation in the E70_max, E100_max, and VLI limits in EN 228 would introduce unacceptable vehicle driveability or regulated emissions performance problems. The results were used to advise CEN/TC 19/WG 21 on the revision of the EN 228 petrol specification [1]. A procedure for future revision of EN 228 (see Annex A) was also developed.