[GFXjamie]

no, soon as this time of the year comes around, they change to a winter blend of gas. Look at every petro canada, they usually have a blue sticker or something like that on every pump saying something about having the best winter gas blah blah blah.

They formulate it different due to changing temperatures, reduce the chance of condensation causing freezing in your tank/lines and is suppose to be better on cold start ups. Their website states " It evaporates more readily than summer gasoline for improved cold weather start-ups." which may have a reason behind the poor fuel mileage

heres a link to petro's site on winter gas

http://www.petro-canada.ca/en/wholesalefuel/318.aspx