i just talked to our neighbor who was in England for 2 weeks earlier this summer (i paid her little 8 yo to get our mail and water my plants on the deck and front steps), she said it cost $80 USdollars to fill a tank over there. the exchange rate is $2 to a pound.
I am used to paying $80 to fill the plow - it holds 40 gallons, after all.
But at $6.80, that would be...~shudder~...$272.00
Hey, I think I have to raise my price for plowing your driveway...LOL