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most stock cars need at least 91 at sea level now, you can get away with less at the higher altitudes but not a lower. The only car Id use the cheap stuff on is a stock dished piston 72... and maybe not the lowest grade even on that. Keith > By the way, do you guys get 85 octane gas in Northern Arizona? We have it > all over Colorado, and I've only ever seen it in higher altitude locations. > How does this gas affect our cars as compared to 87 octane at lower > elevations? > > Doug ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~