I too have a stock 2.4 (2009). It may sound funny but my Dodge Magnum with a 3.5 6 seems to like mid. OK, that's not the funny part, the funny part is that the place I get my gas, COSTCO, only sells hi and low grade. So after filling the tank with one, I then only let the tank get half empty before filling again with the other grade, alternating at each fillup.
Now, I am trying the same thing with My Sol... as an experiment.
Last edited by dabbler; 01-07-2013 at 05:21 PM.