I always use Tesco Momentum 99; it's available in Peterborough & Sleaford stores. Article with some test results comparing Shell, BP & Tesco 99 (what is was called before being renamed Momentum):
http://www.thorneymotorsport.co.uk/tuning/Fuel_Test_Results_Update.shtml
Also:
http://www.tesco.com/Momentum99/files/Tesco-Momentum-99-Fuel-Report.pdf
Andy L-T
http://www.thorneymotorsport.co.uk/tuning/Fuel_Test_Results_Update.shtml
Also:
http://www.tesco.com/Momentum99/files/Tesco-Momentum-99-Fuel-Report.pdf
Andy L-T