I came across This site when researching buying a second hand car.
Save Fuel Guys Auto Trader UK has a fantastic Fuel Saver Scheme.
All you need to do is register to be a member then start collecting your free fuel vouchers from selected shops, which can be used at any ASDA, Sainsbury’s or Tesco forecourt.
Go Here
Visit the Autotrader UK website , Scroll down until you see in Big Green Letters “ Auto Trader Partners” ,Click on that and look for the Petrol Pump icon and the message that’s says save £100’s on fuel