Can't remember where I read it
but IIRC all fuels have to pass the level thats displayed! So say a 95ron fuel will give 95.5 - 97ron, this probably goes for all the fuels.... 95 / 97 and 99.
I would 'guess' that v-power although marketed as 99 here and 100 overseas, is the same fuel!! I would imagine that to surpass the required 'minimum' labelling as 99 means the fuel passess the minimum requirement and meets the rules for UK fuel selling? Just a guess though.
also, IIRC adding the same 'additive' to different fuels gives different results! the highest 'RON' gains obtained from adding to lower graded fuels. You get ahigher RON when adding to 95 than you would mixing the same quantities with say 97?
I expect someone like Scott or Simon will know for sure but I believe adding octane booster to higher grade fuels can also degrade the fuel your adding to? something to do with burn temps or similar. Thinking that the higher rated fuels have additive already included to raise values.
Isn't it believed 'safer' to run on lower graded fuel 'off' boost, than to run with a fuel and octane booster? If this is the case, I would only use octane booster as a temp to get you to a 99 store
