If I do purchase one, I'll be running it on PULP unless I'm forced otherwise by availabilty. It's the reviews showing 16.5l/100km that concern me but as stated, the "warp speed" trip is the major factor. As for the price difference, Shell have been selling Optimax for up to 8.5 cents a litre higher than ULP. I have seen this first hand. Considering the price difference on release of Optimax was 6 cents, it is certainly going against the trend of "It'll come down when it gets more popular". Obviously not selling much. I think PULP is actually 95 RON and above so I realise Optimax is not the only option but I may be locked into using Shell via a fuel card. I'd be happy to average the 13.8l/100km achieved by the TS50.