Hello, Does anyone have any views on using Optimax petrol in their NSX. I have been using this fuel for about a year and by chance moved over to Esso Premium. I have found the difference to be startling. With the Esso fuel definately coming out on top. With Esso, i find that my car is much more responsive, it is also easier to change between gears (much more smooth). Previously with Optimax i found that i had to concentrate more on getting my clutch control right otherwise my NSX would 'shudder' between gear changes. This certainly took the fun out of driving. I'm only sorry that it took me so long to 'discover' Esso Premium. I'd be very interested to hear other peoples comments on Optimax or anyother petrol they rate highly. I've tried Texaco Premium, but didn't think much of that either. Why should different petrol make a car react like this?? AMAR 91 Silver NSX 48K miles