Quote Originally Posted by aaronng View Post
Well, try out every fuel at least once. If you have tried BP Ultimate, Vpower and Mobil 8000, give Vortex98 a go if they sell it in your area.
wouldn't doing so not give you a true representation of what the fuel can do for your car?

I was always under the impression that the best way to test the fuel's capabilities would be to run as high a percentage of the said fuel as possible. this would mean that if I want to test Fuel B, I need to make sure that I top up Fuel B whilst I have as little as Fuel A left as possible, and then proceed to top up Fuel B for the next few rounds to dilute and reduce the proportion of Fuel A out.

or maybe you're just "sampling" the goods before you give it a test run?