You can get a £2 off 30 litres of V-Power Petrol or Diesel here:
http://uk.cars.yahoo.com/drive-smart/Scroll down and look at the bottom advert on the far right.
Keep refreshing the page until it says "Print you £2 voucher". It will do, if you refresh enough times. Don't settle for the £1 voucher offered.
Then it prompts you to install a voucher printer (this is clean, and OK, you can uninstall it after if you want). The it prints the coupon, to your default printer.
Please note if you say the coupon did not print OK it will print you 1 more (2 in total) and they both have unique codes on them so you can use both. Expiry date is about 1 month.
Anyone worried this is a scam, you'll see it actually takes you to a shell.co.uk site.
Enjoy V-power for the same price as supermarket gunk
Plus New Dr Who and Top Gear, what more could a man want.