Just seen that costco have 95 ron down to 99p and was just wondering if there is any benefit of going for the 97 ron which is still about 1.14 so still a fair difference the now, usually take the 97 ron from costco for my 1.8 tfsi as its usually same price as the 95 ron from the supermarkets but with the price of ron 95 being so cheap the now at costco at 99p is there really any benefits of the 97 ron ? Dont ever see much being said about it as most people just use 99ron if wanting premium fuel ?