Jus, are you still using premium fuel as stated in an earlier post? Does it improve mpg sufficiently to justify the somewhat higher price? I finally bought an Energi and have started experimenting with fuel efficiency. It's interesting to me that the EV miles are very large with some tanks, like yours with 833.8 miles. This also means that when you use gas, the mpg is quite low. Your 833.8 mile trip had just 13.32 mpg when excluding EV miles. The average is just 21.56 mpg when excluding EV miles for the 600+ club. With EV Later or the "plug-in" battery discharged, Energi owners should need similar if not identical methods to improve mpg. Anyway, I've read a lot of your posts and can finally start trying it out with my Energi. Thanks for the information. :)