Starfire Posted June 3, 2016 Share Posted June 3, 2016 The main advantage of premium fuels is that they have a higher octane rating, which means that they are more resistant to pinging (pre-detonation) in high compression and high performance engines. They also tend to have additives that clean up the fuel system a little more than regular fuel. Given that most B series engines run 6.4:1 compression and even the "high-performance" ones (Mk 7 and Mk 8) only run 7.25:1, they're nowhere near being in need of high octane fuel. The relatively crude carburettors aren't too sensitive to fouling and they will pretty much run on any fuel you like. To that end, I run the cheapest unleaded that I can find, and have no problems with it. I've not tried ethanol fuel in my vehicles, but it can adversely affect some rubber and yellow metal components on older vehicles and therefore should be avoided, if possible. Cheers, Terry Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.