Surprisingly No one uses Vortex ?? Its cheap and is really good on the car...i recommend atleast give it a try once...have never used BP (Bloddy exPensive), filled up Shell once...was very rough on engine...never again....Vortex has always been 100% for me and with the woolies voucher too ;) if Vortex is so excellent i gotta try the 98 stuff !!! I swear by Caltex....Shell sucks