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Old 06-15-2011, 07:41 PM
erm
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You should be just fine running the 93 tune. Some folks have reported back that they liked it but actually felt that the truck was faster with the 91 tune.

As for me, I can't get anything higher than 92 octane here so I stick with the 91 and it does just fine.

So, why not try the 91, fill up with 91 or better and try it out.

Then, swap over to the 93 and see how that goes.

Each truck is different and differing local ambient conditions do have an affect on how a truck runs.

Good luck and let us know how it goes!
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