cant wait for that optica...used to "daydream" of that plane and doing local recon work for the railroad or PGE powerlines..there used to be...or is in summer time a PA-18 i believe it is..that patrols the pipeline,,,we have this underground pipeline that carries fuel from (i think) the bayaera to back east....its high pressure and carries all kinds of fuels..runs along the the old Southern pacific right of way...now Union Pacific,,but they have "pigs" to seperate the gas from the desile ect...and years ago i learned from from gasoline people...guy named jerry bullard ,and then Tom Dewelle,,( critical Mass reno racer guy) owns a fuel company...this pipeline sends fuel from the refineries to other ditrabution centers,then get sent on trucks to the differant stations.....thing is...its all the same fuel...once it get to the distrabution center it all goes in the same tanks,,,once loaded on the trucks and shipped...its either mixed on the truck..or when its put in the tank at the station,,so when texico,or shell or who ever sells gas now....it all starts equal...same base fuel..they put in additives to make it "thiers" at the reatal level