[1993LUMINATOR]

and that is an interesting read, l'v mixed UPI 89regular with 91oct Shell a half half mix l have the time l'll see if theres a difference and actuly my engnie did work better l got 2-3mpg better l have the digital gauge determins rough MPG l did the same strech of road same speed same tempature same barametric prssure same sunny day. l knwo theres mythes but hey whatever you want to belave or whatever suites you better my driving habbits and vechials l drive mostly fullsize cars and pick-ups highway and backroads l'm a country guy