I think a wise thing to do would be to put only 100% gasoline in your tank. It's about .30 to .40 cents per gallon more than e10 in my area. You won't have any of the issues with ethanol sitting long-term.I just bought my Clarity at end of December, 2018. I have put on 850 miles so far. All of it using EV mode. Haven't used any gasreally. It did go into Hrbtid mode once when I ran out of Battery on about a 50 mile round trip. Maybe I used 1/4 gallon. No sure.
I am retired and expect to do mostly local in town quick trips.
1) How often should I use gas in Hybrid mode to just exercise engine and use some gas? Should I put some gas additive in to preserve the gas from getting stale?
2) How can I tell how much electricity I use to charge the car each day? Someone mentioned some app can do it.
3) I do have extra solar power but in first month, we had cold, rainy weather and my solar output for real low.
Any one else using solar to power plugin? I noticed that 4 of my solar panels are consistently giving me hald the KWH output of the oother 12 panels. I suspect that there is soem shading impacting the solar panel electric genertion. I may try to have them moved.