Before I get to the trick: Ford sent out an e-mail to people who have a Mach-E reserved (and of course news and rumors are running rampant). Apparently we can start converting our reservations to orders (at least in the US) next week.
Ok, now on to the trick. The trick here is how do I estimate how well the EV is driving, or rather who well the GOM is calculating my range to go (as a side note kind of related Ford has said the Mach-E is going to crowd source the GOM! interesting). (GOM = Guess-o-meter, or range to empty).
Lets say you have a longish trip, say 85 miles one way, or 170 miles round trip–give or take (oh hey I just happen to have driven this today, hmm). Most of it is highway and you want to estimate if you’re driving more or less efficient than the car thinks you have or will. Bear with me here…lol
Leaving with a full charge the GOM says you have 230 miles available (since this is slightly less than the 238 rated range the car has calculated my recent efficiency a little worse than average). Reset the trip meter upon the full charge so you can watch the trip meter go up as your range decreases.
Now here is the trick: While you’re driving add those two together (yeah ok wait until they get to easy values like 50 miles on the trip meater and 180 miles remaining). If you’re driving about the same efficiency as you were before the total should equal the full range at the start of the trip. If the total has fallen then you’re driving less efficiently and if the total rises you’re driving more efficiently–yeah all this math is hard.
Now for the trip we took today: 170 miles round trip, the car read 230 miles, it was in the mid-80s for temperature, air conditioning set to 70, and my speed ranged from 70-75 using cruise control (and occasionally going faster to pass people). As we were driving I would glance at the miles remaining and the trip and add them up.. 230, 230, 229, 229, 230, 229, 228, etc. By the time I got home (with about 50 miles showing on the GOM) the total was around 220. This means that driving on the highway at 70+ mph caused me to lose 10 miles of range or about 4%–not too shabby.
This is much better than many would expect from driving on the highway as most estimates say you lose about 10% in range from highway driving (or more). I’ve noticed this a few times now in the Bolt but I didn’t have an effective way to quantify it until I thought to add the values together…cool.