I'd like to get 40 mpg or higher for a long highway drive down I-5 from Northern California to Southern California (400 miles) with our Energi Titanium. Except for the initial charge at home, assume there is no opportunity to plug in. 1) I'm thinking I should use EV later, but I'd like to strategically use EV mode (eg. always use EV later except when not on the freeway?). At the end of the trip, the number of EV miles left should be close to zero. I will be able to recharge when I get there, so there is no need to save EV at the destination. 2) What speed would be best for best MPG on ICE? I've read in the hybrid forum that results are bad at 61 mph with ICE kicking in and out. I'm guessing that is the same for us with EV later. 3) ECO-cruise the whole way or not? I've found that downhill should have ECO-cruise turned off to trick the car to not use ICE. We have adaptive cruise control. We use the +/- to change speed or let the computer do it. 4) Can I get EV miles back if the battery is totally depleted like during the long and steep downhill on I-5 from the Grapevine to the valley? Any hints for this upcoming trip would be greatly appreciated. If there are places to plugin I don't know about on I-5, that would be great too. :)