In my daily driver, i use 93, with a bottle of lead additive called 'instead o lead' from wal-mart. i've tried each gas, with and without the additive, over the couple of years i've had my beastie. although i know nothing of the technicalities of it, she runs a heck of a lot smoother with the 93, and for a rooted, 6 cylinder,badly needing an overhaul engine, i figure a little babying won't hurt!
another thing i've noticed is that over time with this combination, my milage had gotten better. either that or my speedometer is rooted too!
