Even within this thread, you'll find others who said the opposite...that lower octane produces best power by not inhibiting the "burn". Unless someone has run scans and sees evidence of timing retard, I gotta think 87 is best -- like the owner's manual states.Originally Posted by VX KAT
They wouldn't have coded timing tables for 93 octane and said use 87. Every few months you see how people are wasting their money buying "high-test" thinking it's better for their car. If it doesn't require it, it's not better.
btw...my guage hangs on full until 40-50miles, then it drops like a rock to 1/4 tank. So, it takes 50m to get down to full...and 25 miles to drop the next 1/4 tank. Pretty nice calibration their Isuzu techs!
Yeah...I finally broke my personal best and hit 16.5mpg last week. I finally got a few miles/day on the hwy. But, it's not the best cause it's during the to/from rush hour.
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