In most cases what ever I can find

its had full race fuel, 4 star, 95, 97 but most of the time 95 because its stock all my other tuned cars get the 97+
If its just a stock daily driver like my golf then it really doesn't matter but if you have been mapped for 98 then thats what you should use. I think there was a video for 5th gear done at thor racing which is still on thors website