I was shocked that a Chrysler T/C doesn't get better gas milage than that.
Looks like he ran E85 most of the time. That will do it.
I was shocked that a Chrysler T/C doesn't get better gas milage than that.
I was shocked that a Chrysler T/C doesn't get better gas milage than that.

..Played with my econ indicator all the way to Fargo and back and learned a few things. 08 ford with 5.4 engine ,Sticker EST MPG 13/17
10% ethanol 87 octane. Mostly drove 65 MPH as I went through Carrington both ways. Had a strong headwind and a bulky load with the end gate down but load catching some wind on the way down 15.3 MPG. In the end, the computer and the pencil were within 2/10th of a MPG even though I had reset the indicator several times during the trip. 15 miles were city miles .
On the way back I started out at 15 with the air conditioner on and end gate shut. turned the air off and reset and gained 1 MPG . Stopped and opened end gate, gained another MPG. I was right at 17 MPG most of the way but when the sun went down I was in the high 17s ended up 17.8 for the last hour and a half of the trip. I have seen it with old tractors when the sun went down they pulled a lot better because the air gets heavier, With fuel injection I didn't think it would make a difference but i'm guessing heavy air must clear the cylinder better on the exhaust stroke. Or it might a been some wind that went down after dark. In a nutshell, I was ok but not doing cartwheels over 17.8 MPG, I actually thought it was getting under 15 on the highway. It made the drive less boring with all the tinkering going on.
Stalker, I'm impressed with your spreadsheet , I did it on heavy equipment for a while but it was a pain. I think I will start keeping better track of my highway miles from now on.
I'm getting a diesel next time. My avg over 180000 miles on the pickup is 13.5.
pulling a light load like a 18ft boat or a ranger/atv or something the diesels will get way better than 7-9. However throw a 13k camper and a 4-5k boat behind it at highway speeds and you will be in the 7-10. Just my 18ft boat tandem axle trailer i get 13-14 @70 mph, on interstate 11-13 @80mph. camper and boat interstate 8-9, and 9-11 under 70 mph. If it goes through a stupid regen you can take -1-2 mpgs for that trip. unloaded @80 i get 15-17. Under 70 mph its 17-19 unless it regens on an 09dmax.2500. for what its worth.