Part of me really wonders how a bossted and a NA version of the same engine need the same octane. Particularly when the 3.6 V6 in my Jeep has 290hp @6400 rpm, higher compression (10.2 vs 10.0) and runs on either 87 PON or E85.

I do run 89 usually and 93 occasionally but just ran down to Boynton and back at left lane speed and careful fillup said 27 mpg. Was just about perfect conditions, windows up and 55 degree weather, cruise on and winding too high in 6th. Uses no oil. Long trips are nice now that I can stretch out arms and legs so return was nonstop.