I usually put manufacturers' advertising claims down to empty rhetoric designed to do little other than shift a possibly indifferent product. As a user of Shell V-Power petrol, I am aware of their heavily Ferrari-based advertising, although my decision to use the fuel was driven by testing the fuel against other offerings in the area, mostly supermarket fuels, and the results were clear regarding mpg and smoother running, confirmed countless times by yourself and contributers to your weekly column. Readers may be interested to know that when I was at my local supermarket today, I witnessed the spectacle of a brand new black Ferrari, on dealer plates, being filled with Sainsbury's regular unleaded petrol by a gentleman wearing a Ferrari-branded work shirt. It seems Ferrari are not above conforming to the stereotype either.