I do track my mpg on every fill up. I do it for all my vehicles. Not because I care what kind of mileage I am getting in my trucks, but because if there is a big drop in mpg over a few fill ups then something else could be wrong that is causing the change.
Exactly!!!! Easiest way to document performance/problems (or lack thereof).
When I picked up my ordered '18 I expected my sales guy to tell me it MUST be run on premium, but he said regular is fine. As long as I'm near home I fill up at Costco with regular. Long ways away from home I've bought Mobil regular. Never paid attention to octane.
Mileage since new is typically in the 18's per gallon. Sometimes I get 19's.
Big factor if you're obsessed by MPG (with which no Raptor driver should be) is HOW you drive. Wife/daugher car was INOP for a few days so wife drove my truck. Now I had filled up and loaded the bed with HS band props for a trip from central Jersey to MetLife Stadium, 50 miles so 100 round trip. Following the band busses and trucks at 70-75 MPH on the highways the screen showed 20.6 MPG when I got home. Much higher than average. Then wife took the truck for a 100 mile highway round trip and returned it to me showing 18.8. She took it for shorter runs the next day and it came back showing 18.2.
Any vehicle, wife tends to stomp on the gas after stop signs/red lights. This alone could not add up to the diminished fuel efficiency since most miles were highway. Then it occurred to me that she is what I call a "Spazz Foot".... she simply cannot maintain consistent highway speed. Constantly pumps the accelerator for no apparent reason, consistently knocking me back in my seat for no apparent reason. Just driving along at highway speeds w/o traffic interference and I'm constantly being bucked back-and-forth in my seat. SPAZ FOOT!!! This I believe is the detriment to my mileage conundrum.