I rarely drive my Superduty for long periods, just short trips, so mileage isn't very impressive, 17 if lucky, it's a Diesel. Today I delivered my Coleman RV to the new owner, 156 miles one way. On the way down, 11.7 MPG@ 70 MPH. On the trip home 20.5 MPG@70MPH. Not bad at all, the 11.7 is on Fuelly, the return trip hasn't been verified, but based on past fills and subtracting the Lie-O-Meter difference from all fills, of roughly .6 MPG, the LOM read 21.1 MPG. Not bad at all!

My F150 OTOH has barely been driven the past 3 months, haven't filled it since late March, still has 3/4 tank, and lots of idle time to get the battery charged up and short trips. Would not be surprised it it was under 17 MPG. It is normally up around 22 MPG this time of year.

 

My Super Duty rarely goes better than 11mpg. It'a almost 100% urban driving however.

 

I've been running e-85 for many months mostly because the results didn't matter because the price was right for my 2010 5.4. MPG ranged from 8 to 14 but mostly hung in the middle of that range with local driving.

I'm running regular now and on recent 200-mile roadie I was back to nearly 20 mpg.

 

Fwiw, I try to put a tank of Ethanol-free gas in my 2011 FX4 at least once a month, to keep the internals clear, and every third oil change, I put a bottle of Z-Max in for the last 12 ounces of oil. The old horse has 127K miles on it now. Just made a 850-mile round trip to Atlanta and back a week ago. Keeping at 65, I got 16.5mpg going down (with an enclosed trailer). On the way back, though, same average speed, and I got 21.4 mpg! This was calculated, not Lie-o-Meter! For a nearly 10-year-old truck, I am more than happy with it. SCREW, 5.0, , 3.73, canopy. The dealership keeps trying to get me to trade it in, but the way this thing runs, I'll drive it until the wheels fall off. It still looks like it came of the showroom floor (I'm a little OCD on maintenance and upkeep).

 

Lots of helpful Information, Thanks

 

Going to make my new f150 purchase soon and am torn on what engine to get. I like the v8 sound and them not having turbo's. But havent seen too much info about mpg in the 10 pages I looked at in this thread.

I will be getting a travel trailer at some point, nothing too big something in the 19-22ft range. I was going to go with the 2.7ecoboost but when I test drive that truck with the 10 speed the transmission seems to shift quite hard when driving normal. Where as the 3.5 or the 5.0 seems to shift like butter taking the same route and driving the same during the test drive.

I understand a truck will never get great fuel mileage, but I don't want to be limited to what I can tow or i guess I am a bit worried about owning a vehicle with 2 turbos, that once past warranty will cost be a fortune to replace if they go.

Any more 5.0L mpg truck users on this site willing to post more long term mpg numbers?

I was told that the 3.5 and 5.0 are quite similar for mileage, 3.5 might be worse when towing vs v8...unsure if true just word of mouth from a few people. 2.7 seems to be the logical truck to get with the max payload package but I just don't like how hard the transmission shifts for some reason...over thinking that? But it does confuse me how 1 setup can seem more aggresive shifting vs the other 2 which seems smoother and normal lets call it.

 

Never reset Trip 2 from new on my 2016 XLT 2.7. At 46k miles it showed 19.8 average.

Now I have a 2020 Lariat 2.7 with the 10 speed hopefully it does a little better.

 

My 2019 4WD 5.0 RCSB is at 23.5mpg after 8500 miles. This is with a Spectre intake and muffler delete if it matters. I have a bed cover and bed mat which ads a little weight.

 

My two cents after having owned three very similar super crew F-150’s (one with a 5.0, and then two with the 3.5Ecoboost V-6) is to buy a motor based on performance capabilities, not the louder sound of a V-8. The 3.5EB continues to outsell the 5.0 as it’s better at everything except for the obnoxious noise of a V8 in a truck which I no longer care for after having owned the twin turbo V-6 EB motors. You will get slightly worse fuel economy than a 5.0 when towing, but you’ll benefit from noticeably better torque and power. To me, the benefits of the 3.5EB far outweigh the little worse gas mileage that I get while towing. If I was after good fuel economy under towing conditions, I would buy a three-quarter diesel, but I don’t pull frequently enough to justify the extra expense. You should be able to get 20+ miles per gallon very easily with a 10 speed trannny if you keep the stock tires. Good luck on the decision.

Also, I can’t comment on the hard shifting as haven’t ever experienced that in my trucks.

 

2019, SCREW, Lariat 502A, Tech, Fx4, Max Tow, 3.5EB; ARE Pick-up cap/topper
7/2/2020: 1109 miles including 870 miles round trip Mpls to Chicago, 75 MPH Interstate out, 65 MPH Interstate back w/5X8 UHaul enclosed loaded trailer. 18.7 MPG 59.3 gal. premium fuel.