XRAY - Model racing cars

very short question and very long answer ...

First rule: the best is that one you find at the local store with the latest production date. A fresh mid value fuel is better than an old top value fuel.

Second rule: test a good range of fuels, and when you find the best one for you, never change. You will find the best of all engines you'll have from that moment.

Third rule: if there is no price difference (or little difference) do not buy great tank but small and open when you really use it! store in a fresh dark place and remember to shake it well before use.

At last, but this is only my personal advice, I prefer a good fuel that helps me easy and constant tuning than an explosive one but critical tuning