Between changing my commute and turning off the A/C with the cooler weather my MPG has gone way up. I'd love to join the 700 mile club, but don't want to join the "stuck on the side of the road club".

I have 629 miles on this tank and my gas gauge is on E. My MFD is indicating 46.5 mpg. Even if it's off by 2 mpg and I'm only getting 44.5 that would give me over 750 miles on a 17 gallon tank, leaving some in reserve. I feel I can safely hit 700. What do you think?