Tow/Haul Mode MPG

[ricko24]

Towed my 16ft Airstream Bambi (GVWR 3500#’s) this weekend...1way ~100miles in Tow/Haul (yellow) mode the whole way. First time I’ve focused on MPG. Relatively flat from central FL to Ormond Beach. See attached pic...ignore time as my wife and son sat in the truck while I packed up the campsite and hooked up the trailer for 45mins.

I’m pretty sure I can do slightly better in Nornal (blue) mode... maybe 14-15MPG when I’ve done similar trips.

If I’m not going up steep grades or down curvy hills//mountains is there anything else that tow haul mode gives me from either a safety or efficiency perspective.

Planning on going cross country this summer and thinking I stay in Normal mode all the way through Texas then put in Tow/haul once I get to the southwest part of our trip and throughout Cali.

Thoughts?

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[Sundancer330]

I have a similar weight trailer and on my 2018 2.7 I hardly ever used the Tow/Haul mode as it decreased milage a bit hauling on flat ground. In normal mode i averaged about 15mpg so I just left it there. I haven't towed with the 2021 2.7 yet but imagine it will be the same, as you said if you start to pull more grades then it will help and keep the truck from searching up and down for a gear its happy with.