VORTEX 98
V POWER (optimax)
V POWER 100 with 5 % Ethanol
Regular Unleaded
Unleaded with 10 % Ethanol

Anyways i have tryed every thing excpet v power 100

and i find that vortex 98 and vpower are really good , but i dont get
much more K's tho . i find that the power is better with these fuels tho then regular unleaded .

V Power racing (100) is the best, I get better mileage out of it and swear by its small boost over (92)

Vortex is the best value for money, cos you can use safeway fuel dockets .
DO NOT USE SHELL FUELS IN YOUR CAR, apart from the V Power 100, the rest of it is rubbish, and you're not going to notice the difference between 98 and 100 octane, you can run octane booster if it's that important to you.
Honestly though, 95RON standard PULP will be fine for your car.

i race karts and the fuel we use is really important for performance. your in a road car and need to go from point a to b. see the difference?

i did a few threads on this a while back. have a look for them, its all explained.

and shell is s**t house. if you want performance use Avgas. only $1.50 and 110ron.

or for really good performance use Elf. $7.50 for 98ron but its top notch fuel.

so the long and the short? just use normal fuel