Buy one. They are inexpensive to purchase but extremely valuable in the data you will unlock about your car.
LightyKD wrote: ↑
Wed Sep 30, 2020 5:37 pm
but I currently don't have a ODB2 adapter that Leaf Spy is friendly with so that's currently out the question.
Basically, you don't have "13 Miles Lost in One Month" because you never had those 13 miles. The GOM is worthless. Never bother with it -- certainly don't compare it from day to day. It neither tells you the remaining capacity of your battery nor does it tell you the car's range.
Your range is based upon 2 things: the energy available in your battery (kWh) and your driving efficiency (mi/kWh).
Close to when I got rid of it, my 2013 was showing 100 miles on my GOM. That was a joke, especially since LeafSpyPro was showing me 19.5 kWh in the battery at 100% charge. That's about 17.5 kWh available. This is the key number to know about your battery. When it drops (mine was 22.0 kWh when I first got the car), it means you've lost range.
But your actual range is based upon how you drive the car - your efficiency. After 4 years in the LEAF, I had learned to drive sedately enough to average 4.2 mi/kWh for most driving. That meant my car's range for me was about 74 miles. But when I first got the car, my efficiency was around 3.3-3.5 mi/kWh. Were I still driving like that with my degraded battery, my range in the car would be closer to 60 miles.
(And your efficiency drops when you use heat in the winter, which coupled with the battery holding less charge, means your winter range is less than your summer range)
The car will show you your average efficiency. Reset that display on the dash and see how your do over a week of driving. That will help you to learn to eek out the miles possible in your battery.
And most importantly, get an ODB-II adapter and LeafSpyPro so you can know how much battery you have.