Interesting leaflet and article in December's PP about a Porsche Club branded Esso fuel card that will grant 2p off a litre of Esso Synergy. I've been solely running Shell V-Power in my 996 for the last year... might have to bite the bullet and see if there is any appreciable difference between the two. There are also more Esso garages near to where I live, so perhaps the fates are conspiring!
For those that haven't yet received it and are interested: go to: www.essocard.com/porsche
For those that haven't yet received it and are interested: go to: www.essocard.com/porsche