Snowflake

Mine is an '06 w/ automatic also and I average about 31mpg as long as I don't lead foot it too much. I'm in Texas near the coast so its mostly flat land here. ...but I have taken my car for a road trip in a much hillier area. My mpg dropped radically...down to 26mpg. When your car is going uphill the engine has to work harder to keep the momentum up. ...and the steeper the hill the harder the engine has to work. The hunting your tranny is doing is perfectly normal. All automatics "hunt" when the shifter is in "D" when the car goes up or down hill. You might try putting it in "1" or "2" to see if that alleviates the problem. btw...your mpg will not be as good with the O/D off but then again I don't think it is meant for use with low gear (1 or 2).

Hi gang! I'm new around here. A couple years ago I bought my first new car...2006 Toyota Corolla CE w/ automatic tranny. I named it Snowflake the day I bought it because the A/C froze my face and made me feel like I had snowflakes forming on my nose! LOL It's Super White with a beige interior. So far I've gone 50,000 trouble free miles! :D ..and later on today, I'll be doing my first at-home maintenance...changing brake pads. I'm not new to fixing cars. I grew up with a wrench in my hand helping my dad fix them.