yep, clear as mud
lol. my understanding is that you could run the highest octane in you area on the 93 canned tune..which happens to be 91 in my area. basically, no octane less than 91 on the 93 tune....but that's another rant
i will burn the remaining 91 out of my tank and go back to 87 on the 87 perf tune again.
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2008 f150 supercrew, 5.4, 3.73 LSD, tonneau cover, 275-65-18 BFG's. Gryphon programmer. XLT with XTR package. Tinted heads and tails with 8000 HID's. 4300 in the fogs. Gott's Mod. Painted grill.