How do Esso guarantee the synergy supreme 99+ to be ethanol free when Bp, shell etc don’t?
From the Esso website
Although our pumps have E5 labels on them, our Synergy Supreme+ 99 is actually ethanol free (except, due to technical supply reasons, in Devon, Cornwall, North Wales, North England and Scotland)
Maybe down south the fuels come from specific refineries but a large part of the country just gets the generic fuel from the local refinery