Fuel economy

[Jim-Limited]

Anyone try any aftermarket tricks (intakes, chips, etc) that has had a significant impact on fuel economy? 540hp is plenty for me, but I’d really like to get better gas mileage.

 

[Rss1]

I don’t think anything you do will make much of a difference. I think the trucks are about as good as you can get for gas mileage. They’re leaned out from factory to pass emissions.

 

[Riding Deacon]

So....went on a 1500 multi state road trip last week to visit a family member with my 2025 Longhorn with a JB4 tuner. 20.8MPG on the highway.....with a pretty good payload of people, gear and supplies. I was trying like hell to get to the rated 21MPG......and I just couldn't do it. Maybe with some flatter elevation I could have done it, but nonetheless I was happy with my aggregate mMPG reading. Almost 640 miles to empty....at least from the computer. No issues. One thing I found with these new SST HO's, you can't mash the accelerator every time you pull out from a stop sign or traffic signal. That's when those engines consume the most fuel. I don't drive the truck like there is a soft boiled egg under the accelerator either, but just ease into the gas....and decelerate easy into your stops......will also save your brakes. Almost 13,800 (s)miles on this Longhorn and zero issues.....so far. The JB4 in Map 1 is good enough for me.....when I need to pass....or get out of the way. Love this truck.......and I'm coming from a 2500 with a Cummins....which I kept for my heavy duty trucking needs!!

 

[LOWRMPG]

As others said, can't imagine you're getting a boosted 3.0 putting out 540hp to get better than 17-20mpg.