Congrats brother. I also had a great day yesterday. Daily mpg have been in the 46-48 mpg range for my 150 daily miles (average). Yesterday without even trying I finished at 146.7 miles and 51.1 mpg. This was due to the daily temps being in the mid- to high-60s rather than the 30s-40s and little wind. I even found myself trying to get the SoC as low as possible on the 22-mile drive to work and I was able to get it down to 2 bars (getting up to 4000 rpm up some of the hills). Guess what the mpg at the office was -- yep - an astounding 50.5 mpg. Imagine if I was actually trying that time.

My block heater is getting installed on Thursday and hopefully Friday will be a cold morning and I'll finally be able to compare/contrast. I have been testing out the cold engine stats the past few days. I can go basically two ways from home to Pittsburgh and it is roughly the same distance. On warm weather days (or when the engine is already heated) I can do this 6-mile trip and get somewhere around 60 mpg (it is mostly downhill). On cold weather days like today I struggle to reach 46 mpg. Most of the time I am able to go from 60 miles per hour at the top of the grade to 50 miles per hour about 2 miles later almost all in EV/EV-Assist mode and this raises the FE from 20-25 mpg to 45-50 mpg. It usually goes up 10 mpg for every 1 mile during the first 5 mile trip (so at 3.0 miles it is 36 mpg, 4.0 miles it is 46 mpg, and 5.0 miles it is 56 mpg) and shortly thereafter is a hill so I lose the gaining power. I will see what Friday yields as it should be over 50 mpg when I bypass town rather than below 45 mpg. Time will tell.

And on the cold days I will get to the office (22 miles) around 43-47 mpg but on the warm days it is always over 50 and more like 52-55 mpg. I think I would heat the car even if it only has a 10 mpg effect on 22 miles (or consuming 0.5 gal at 45 mpg to consuming 0.4 gal at 55 mpg and only 0.1 gal saved over 22 miles but when I roll over 600 miles total a week and many of those miles in mornings when it is cold or easily 50 miles on a cold engine a week then 50*0.1=5 gal saved per week -- yeah -- heating the car should help the winter FE not take as much of a hit; even if it only helps for 50 miles a week that is still 5 gal or half a fill-up).

--> Averaged 685 miles/week and 49.0 mpg in first year (35.7k miles from Aug 7, 2006 to Aug 7, 2007)