Bruce,
I have shell providing power & main gas to my house , because they were the best deal. I get 3% off 60 litres (15.8 US gallons). So V power is a fuel of choice early in the months at least. 60 l is roughly 350-400 miles of grins.
Spotted your comment about 3% and enrolled in the shell +. As usual it isnt very clear how it all works so could you fill me in. By PM if you wish.