yes you can
anyways. i take it you have an aftermarket exhaust...? without a catalyc converter (i know i cant spell) i hope.... because those things dont like av gas.
if you want av gas, just go to BP kumeu, talk to jeff AND ONLY JEFF!!! and tell him Neil that used to work there send you and ask if you can get some av gas. he might ask you to come back on a different day, but i'm pretty sure he'll let you get some.
but then again, i take it you are getting it at mates rates... because if you have to pay full price (~$1.90) then its NOT worth it. as you get ALOT LESS mileage out of avvy then 98