Depending on where you live in Canada the spread from regular to premium gasoline in the wholesale price for gas stations ranges between 6 and 11 cents a litre. However many stations charge a difference of 32 cents a litre between the two blends.
As such, know that in Atlantic Canada the wholesale spread is 6 cents, Quebec and Ontario 9 cents< Manitoba, Saskatchewan, Alberta and BC, 11 cents.”
The wider difference in commonly seen in pumps prices between regular and premium, is the markup gas stations charge less GST/HST and the wholesale price difference