Originally Posted by Loren

Bring it, dude! I think you'd surprise yourself. We won't be (well, I should say that "with the explicit intent of the trip being maximum MPG, we *shouldn't be*) cruising 65-70. Depending on the route you choose, you'll probably cruise 50-55 most of the time and a little slower in some places due to lower speed limits. Knocking 10-15 mph off of your average speed will have a HUGE effect on your MPG.

Example: The Yaris gets about 38 mpg at a constant 80, and gains about 2 mpg for every 5 mph slower. That's just constant cruising, no pulse & glide or anything. So, roughly 10% better fuel economy for every 10 mph.

Apply that same logic to your car... if you saw 32 at 65, you'd pretty easily see 35-36 at 55. Apply some hypermiling techniques and a max speed of 50-55, you'll probably see at least 38.

What are you driving with a CVT, anyway?