My intial fill up for my 2016 Gen 2 was on 10/20/15. The Fuel Maintenance Mode then started on 4/20/16 with about 3.5 gallons left. I filled the tank back up with 5 gallons thinking it should stop this mode. It is still running. Will it continue with this mode until it uses 3.5 gallons? My commute is 38 miles round trip, so I am normally using no gas most of the time. What should be done to prolong this mode from starting in the future? Thanks.