Getting ready to go on a road trip. What are y our experiences using just HV or HV Charge. I know that in charge mode that I will get about 50mi on initial charge and then for each mile driven in charge mode I'll get about a mile EV. So on a tank of gas (7gal) at 40mpg, I should get about 600 miles unless the mpg drops off. What I dont know is how HV mileage might work out. Any data? Thanks.