I just went and rechecked and my leaf is now down to 7 bars, not 8. It has a 58% SOH. At 80% charge, the GOM is 39 miles (it's reads 49 miles at 100%) in park (not eco). After driving the car 26 miles (2 miles at 65 mph, 24 miles at 45 mph), the GOM shows 6 miles. I don't have exact SOC at this point, but I can get it in the next couple days. Voltage delta from min to max battery cell is 22mv according to Leafspy at 6mi left. Tire pressure is 38psi, but it did not come with Ecopia tires.
You are correct in that I haven't taken it to VLBW. I made the assumption that because 39mi drops 33mi in 26 miles, that 6 miles will become 0 in 4-5 miles, but that could be wrong. When I do drive it on the highway, the mileage is far far worse.
Oh. Eek regarding 7 bars.
Yeah, you're calling it quits too early and it sounds like you aren't charging to full either. The GOM still actually shows a number and yes the GOM sucks.
As I mentioned at http://www.mynissanleaf.com/viewtopic.p ... 43#p447143
, Turbo3 told me about the imbalance reaching hundreds of mV when near dead.
Your tire pressure is too low and it's possible your tires are also further hurting your range.
You can also use the Leaf Spy's smarter GOM to help adjust your driving if you need to make a certain distance.
Don't worry about the % SoC that Leaf Spy shows. IMHO, that's worthless. Instead, look at the raw number of gids. LBW should sound at ~49 gid and VLBW should sound at ~24 gid.
So you were right. I call it quits when it shows 8 miles left or so, but that leaves 50 gids in my pack. I should be more willing to go lower--I was afraid the car would just quit. But with 50 gids left, that's a lot of leftover range...
I'm also not willing to inflate my tires more. Two of the tires are max rated for 44 psi, so I don't want to put more than 38 psi cold into them, as when temps go up or as you drive on them, pressures rise. No potential tire failure is worth an extra mile or two of range. I guess I could inflate the other two to 40-42 psi (they max at 50psi).
I'm sure the previous owner qualified for an in-warranty battery replacement. Unfortunately, they didn't do that, and it's beyond 5 years now, so too bad for me.
Btw, driving very conservatively (slower speeds and braking very carefully) I started at 70% SOC (120 gids) and got home with 40 gids after going 35 miles round trip. That means at 100% SOC I should be able to get 74 miles, which would be rather insane on a 7 bar battery. Keep in mind that I caught nearly every green light, almost never used the brakes, and was going 40 MPH most of the trip
But again, once I get on a highway and I'm going 60-70 mph, the range and battery tanks. It may be amplified by my weak battery--an older battery will have a higher internal resistance, which will kick in at higher current draws. So I expect to lose more mileage at high power settings than those with a fresh battery.