I suspect the short runs of less than 10 minutes are killing your fuel economy. The engine never gets a chance to warm up. Take it out on a road at 55 MPH and drive out and back for 30 minutes each way. Then see what the fuel economy reports. Also, to rule out a dragging brake, when you get back, use the back of your hand and gently touch each wheel. They may be warm but they shouldn't be hot - a hot wheel indicates a dragging brake.
2018 Honda Clarity Touring PHEV - Forest Green w/Tan interior (wife's car)
2017 Volt LT - Heather Gray; black bow ties, Hidden Content
2012 ECO MT (Hidden Content ) - Black Granite/Cloth; Hidden Content ; Hidden Content ; OEM Fogs w/Chrome Covers; Hidden Content ; Hidden Content ; Hidden Content
2010 Mit Lancer GT MT (traded for ECO @31K miles)
2002 Pont Montana AWD (traded for 2012 LS MT @182K miles - title transferred to son on college graduation)
1990 Pont Transport (traded for Montana @240K miles)
1986 Fiero GT MT (traded for Transport - needed more seats)
1985 Fiero 2M4 MT (traded for Fiero GT @8K miles)
Also, if it makes you feel any better, this was my last top up before we head to the beach this weekend. 100% city/gridded streets/gridlock driving. Saw highway speeds for maybe 15 miles on the tank.
Sent from my SM-G950U using Tapatalk
That said I think if I lived in the suburbs or down south with pretty open flat roads, I'd definitely go oversize like that. It just looks so gooood.
I am not saying I am in the same ball park, but when I first got my '14 2lt , the mpg slowly went down a lot..... like initial full tank was around 440 mile.... then after a while it was 379-400... and this was on 87 octane... and at the time I was delivering pizzas.. and this was all from may 2 of last year till this past march... and insert a change of jobs, and one drive into work and home of about 25 miles. And slowly my full tank went back up to 480 miles per tank on 87 octane... then I started using some 93 octane and bam!!!! I am over 500 per tank... I will say as with any car, short trips or stop n go trips are the worst for mpg
Sent from my SM-G935V using Tapatalk
I think it might be what was said earlier about the DIC
it will report the average gas mileage for the last 1000 miles if you have it set that way
you won't see much change unless you set it to last 25 or 50 miles
you change it via the steering wheel buttons - have to hit the center check key when the mileage display is shown