Repsol, Supplier of the First Single-Seater French Formula 4 Championship to Use 100% Advanced Biofuel
(Biofuels Central) Repsol, supplier of the first single-seater French Formula 4 championship to use 100% advanced biofuel. Repsol has begun supplying 100% advanced biofuel to the French Formula 4 championship for use in pre-season testing at the legendary Bugatti circuit in Le