Your right on there OMV...why would you want to buy fuel in Ontario anyway? Today unleaded gas is going for $1.069 a litre around town here today, now forget we have a different dollar and just compare the costs...
4.5 litres = 1 Imperial Gallon = $4.810
3.8 litres = 1 US Gallon = $4.062
Add the extra mark up on fuel on the highway service centres,
and it gets real costly, real fast...
Recommend you check out the couple of US Branded truck stops up here (J & TA) just off the 401 around London and Woodstock, and again there is a (J) down east past Kingston...
Some local stations have diesel "but" not refuelers, so image filling your rig with a pump limited on its output...yes, we actually have laws in Ontario limiting the flow rates of
our Gas & Diesel pumps/Dispensers...
Good Luck Out there...