well, if the base fuel is different, of course there'll be difference when adding octane booster..
as i said, the only reason im not using vortex is the cost, my car actually runs better, and uses less petrol on it (400k's to a tank on ultimate, 470ish on vortex) but even those extra k's still arent enough to offset the extra cost of the vortex.
Elmo.



The last one I drained had a couple of insects and a christmas beetle and that was it!
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