RE: R/T six speed needs 91 Octane?
91 octane isn't readily available here in my area, 87, 89 and 93. Even though my Challenger is an auto, it's had premium from day one. I don't want the ECM remotely thinking it has to retard timing because of octane deficiency. Also, I think it's better in the long run for the engine, I get 16 city and 24 highway, car has 1700 miles on it.