Good report. This confirms my decision to go with the 4.30 gear set.

As an aside, I also looked into what effect opting for the factory 20" tires would have. Using the overdrive .69 6th gear, from what I can determine, going from 18" to 20" tires would effectively result in the 4.30 gears performing like 4.00 gears. If accurate, this is still an improvement over the 3.73 gears. I'm open to correction on this and would love to hear more savvy folks than myself comment. Always looking to learn!

 

tjkadar,
What size tires are on your truck?

 

I'm running the stock 275/65R18E tires.

 

Based on Ford's published tire specs, I think you're on the right track. See below, and here's my calculation:

4.30 X 596 / 646 = 3.97

HTH,
Jim / crewzer

 

Filled up yesterday, 341.5 miles driven at 26.98 gallons used. 12.65 mpg for a hand calc'd tank of mixed city and back roads, just my normal driving. I thought I might be closer to 13 because I notice my rural mpgs seem to be improving. But the stop and go just kill my overall mpg.

 

12.87 today for the full fill calc.

 

Just filled up yesterday, I do 15 miles back and forth between towns for work, 50/50 mix of highway, i took the tow tune off so its stock right now, 11.7mpg.. I did run my truck over a scale the other day and the front axle scaled at 4200 and the rear at 4000, and thats my standard truck without anything in the bed. I want to find a full scale to put the whole pickup on, but close enough for now.. 8200lb with no load.

 

Been using the truck to make the 98 miles, round trip, commute to work this week. About half the trip is city driving and half at 70 mph. Averaging 14 mpg for the week with my wife doing the majority of the driving. If I were the one driving, it would be close to 13.5 mpg.

 

So, I hyper-miled the same trip I took with the 6.7 loaner I had for 3 weeks.

The 6.7 was 17.2.

My 6.2 was 14.0

This trip is just shy of 50 miles with 1/2 being 2 lane highway 55-65 speed limits; the other half is a mix if country roads, and double yellow line roads speed limits range from 25 to 45.

A fair amount of rolling hills on this trip too.

 

JeepPuller, congrats on finally getting your 6.2. You went with the 3.73 correct?

 

Thank you. Yes, I have the 3.73 gears.

 

Drive down from Casper to Denver early this morning in my new truck to have airbags and Torklift brackets installed for my truck camper.
I set the cruise at 65 and was running 1700 rpm's. Below is a screenshot of my trip meter on they ride down this morning.

 

Nice wyobull

 

Not bad at all. I'm heading down to the beach next weekend to clean up the condo remodel. I'll take a shot from the drive; it is basically all flat if not just a little decrease in elevation. I'm hoping for similar results. My only problem is there is a section where 80mph is the 'slow lane', so I'll be getting run over with the cruise set to 65!

 

Pretty good for a brand new truck! A 4x4, right? Have you noticed any significant differences between your new truck and the old (a 2016, right?)?

Best of luck!
Jim / crewzer