Fuel

[Matt the boy]

Hi everyone, I'm just wondering what fuel people are using on their Puretech engines: Esso or Shell. Or can we cheat and go with E10 supermarket fuel? Obviously I want the fuel which provides me with the best mpg possible. 

[Vauxhall Owners Club]

I only ever run my BMW Z3 on E5 SuperUnleaded from Esso 
DIscovered just recently how much of a difference to performance, smoothness, response and even MPG.
Never used it before as the cost is far higher than E10 but there is a reason for that and the benefits are worth the cost.

[Vauxhall Owners Club]

Any other members have an opinion on this?  E5 or E10 ?