Ah Chicago....(I'm around Chicago too) winter time you should only expect 15-20mile out of 100% charge if you aren't taking extra steps to pre-condition and mitigate (which is alot of extra work and most people aren't worth their time), now that its warming back up expect to see the miles for full battery to slowly climb back into the upper 20s/low 30s, if the condition are right i have eeked out almost 40mpg.
If you want to go through the trouble here are some steps you can take
1) for a set time commute and if you have a smart level 2 240v charger, scheduled the VAN to finish charging right before you leave for work (240v charging will warm up the battery, so you dont need gas or toaster to warm it up, battery doesn't work well if its too cold, the van will warm the battery if its too cold)
2) if you have a 240v charger, pre-warm your cabin, DO NOT USE the remote start in a closed garage, rather WITHOUT pressing the brake press the start button twice and make sure the climate control is on. This way it force the toaster to warm up the cabin while you are plugged in and charging.
3) if it's just you or front passenger, once you are driving turn off the cabin climate control and just use the seat warmer/steering wheel warmer, that's a good compromise between no heat and toaster heat. but you may need to turn on the climate every so often to clear the windshield of condensation.
The "self tuning" sounds like "Fuel and Oil Refresh Mode / FORM" cause by either stale gas (more likely in summer time) or lots of short trip causing potential condensation to collect in the oil (oil has to reach a certain temp to burn off the water). unfortunately you don't know which is which. a rule of thumb to get out of that mode is 1) fill up with gas, if that doesnt fix it then 2) drive for long trips 30mins-1hours plus or 3) let the car idle for 15-30 minutes.
1 will fix fuel refresh
2, 3 will fix oil refresh
the oil has to reach a certain temperature for a certain duration to exit oil refresh mode, #3 won't empty your tank as onc ethe car exit FORM it will go back to electric mode which mean the ICE is off. Just dont' do it in an enclosed garage as you don't want to be poison by car exhaust.
Last edited by Bitslizer; 03-18-2019 at 05:40 PM.