Gave up with Shell a long time ago, despite the fact its the nearest Garage to me, open 247 and is reasonably priced, think about 1.19 for the normal stuff, used to get some nice incentives to use the V Power through the Drivers Club, but that Loyalty scheme is just a joke now, often get a mere 40 plus points for filling up with VP over the next week, an extra 40 points for spending an extra 10p a litre is that really the best they can come up with.
being a heavy LPG user (all my cars are LPG) I tend to stick with Salisburys and Morrisons, and use there loyalty schemes, purely for Fuel, I am really lucky on LPG around here or on the way into London, a good choice ranging from 54 to 57p, or even Shell at 59p if Im really stuck on the way home.
BP used to get a look in for LPG using there 10p off per liter using there Card Stamp thing (MRH) but theve stopped that now, occasionally I get offered free 500 Necter Points (worth £2.50) so if Im passing I'll wack a Fiver in the Emergency Jerry Can, so that half price Fuel for a rainy day if the LPG ever runs out.
But for me its still LPG all day long, the 3.2 Manual will do around 23 mpg on the stuff without trying, doing the maths thats the same as doing over 50mpg on equivalent Petrol costs, the Veccy 1.8 SRi does a lot, lot better, and if Im really in the mood, on my own and no one is looking I'll jump in the Corsa 1.2 LPG run around which will hoover around 38mpg on LPG, thats equivalent to 82 mpg on Petrol and approaching 90 mpg on Diesel Costs, is a No Brainier for me.