Sorry I can be a little dense at times but I'm still not clear. "EV Mode switched to HV Mode" sounds to me like that would be when you let the computer handle things because the computer defaults to starting out in EV mode then it automatically switches to HV mode. But you say that's the one where you try and manage things. Just to help me, instead of names I will list a few scenarios, based somewhat on assumptions for example I will assume that since the trip is 60 miles each way, the outbound leg is probably longer than your EV range since much of that is presumably high speed where EV range gets used up relatively quickly. And I will have to assume that outside temperature conditions are the same or similar as is AC usage. Scenario A: Start with a full charge and a full tank of gas. Allow the computer to manage the entire trip. It will start out in EV, then sometime before reaching your destination EV range goes to 0 and HV mode is automatically activated (you will be in HV mode at this point even though the HV indicator won't appear on the display). You will then be in HV mode for the remainder of the outbound trip as well as the entire return trip. You end the trip with 0 EV range and having used X gallons of gas (this means the trip must end at the gas station not your house so that you can measure the actual amount of the gas used). Scenario B: Start with a full charge and a full tank of gas. Prior to starting out switch to HV mode and remain in HV mode for the entire outbound trip of 60 miles. Prior to departing for the return trip switch to HV mode (otherwise it would default to EV). At some point on the return trip, making sure that your EV range is less than the distance to "home" (actually the gas station) turn off HV and the EV range will start going down and should get to 0 before you get to the gas station, at which point it will automatically switch to HV for the remainder of the trip. If there is more than 0 EV range left when you reach the gas station then the test is invalidated and cannot be compared to scenario A. You end the trip at the gas station with 0 EV range having used Y gallons of gas. Scenario C: Since your return leg is slightly more than your EV range this is probably a little easier than scenario B and should have similar results. Start with a full charge and a full tank of gas. Prior to starting out switch to HV mode and remain in HV mode for the entire outbound trip of 60 miles. When starting out for the return trip of 60 miles allow it to default to EV. At some point towards the end of the return trip EV range will become 0 and HV mode will be automatically activated (even though it doesn't show it on the display). You end the trip at the gas station having used Z gallons of gas. What we are interested in is what are the resulting values for X, Y and Z, i.e. how much gasoline is used in the different scenarios. If you aren't ending the trip at a gas station and measuring the gas used and are instead going by what the trip mpg is showing that is not accurate data. And if you end any test with more than 0 EV range then it is not a valid comparison to a trip which has remaining EV range.