Thank you for the useful information. I'm done trying to convince BigJim raw facts from observation with this....

All i know about gas is this. I used to get gas before i went to swim in the mornings at 4:30. Took about a month and a half and my carb fauled up. Since then its at lunch time at a busy place and i aint had no problems since. I know it could have been the filter but hey i dont really care. Im superstitious. All i know is this. With that carbed 258 in city i get depending upon how heavy my foot is that tank from 13-15 mpg and highway i get 16-19. I cant really complain for an old beast with a carb. It moves me. <img src="/forums/images/graemlins/kewl.gif" alt="" />

i figure my gas mileage on the way i use my jeep which is a combo of around town and highway and i average 18 mpg in a 90 yj islander with carbed 258. a buddy at work has 89 w/2.5 says he's lucky to get 11. i do maintain mine better which is part of the reason i keep a close eye on fuel mileage.87 octane is all i ever use never noticed enough difference to make me switch