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Round trip to and from work today. Summer gas is netting me way better mileage than that winter crap. This was highway but with a fair bit of stop and go traffic. All stock 2013. On 275 70 18s. Can't complain about mileage but not as fun to drive being mindful of driving habits


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2015 F150 Fx4, SC ...

1000 miles into our trip. From Sea Level to 7000 ft and back down again. Sitting in LA traffic ... That sucked! All while towing a ~2500 pound trailer, 5 souls on board a full bed of luggage and 5 bikes mounted above the rails to increase my air resistance as much as possible. Speeds have been no more than 60ish (thanks to CA stupid 55 mph towing a trailer law) ...

Averaging 15.7 so far. Really impressed.
So 1500 miles total on this trip. Ended up averaging 15.1 over the entire trip. Going North on I5 from LA to NW of San Francisco, I fought a head/cross wind the entire time. This averaged about 13.6 mpg ... absolutely SUCKED! You know it is bad when the 18 wheeler in front of you is leaning for miles at a time.

I leave Friday for another 500 mile journey through the mountains ... but no trailer, no bikes, just the truck, me and one passenger.
 

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Super happy with this. My usual is about 14.5. But a trip across the state about 70% highway did alright. Held cruise at about 73mpg.

Truck is a 2012 XLT 4x4 Screw with 6.5 bed and max tow, 3.73 gears. Also had 6 people in truck and 700lbs in the bed. And has heavy LT 285/70/18 grabber at2 tires and a leveling kit. This was running a 93 perf tune. Never been this high before.
 

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Hey Guys:

After 16,000 miles here are my results:

14 MPG towing my 6,000 pound Airstream. I consider that pretty good. I keep it under 70.
16.5 Around town, using SS, and no sport mode. Disappointed in this!
20.5 Highway, not bad bout would love to get it up to mid 20's.

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What engine and truck specs? That towing mileage is really good.
Hey Guys:

After 16,000 miles here are my results:

14 MPG towing my 6,000 pound Airstream. I consider that pretty good. I keep it under 70.
16.5 Around town, using SS, and no sport mode. Disappointed in this!
20.5 Highway, not bad bout would love to get it up to mid 20's.

All stock
Baaaaaaaaaaa
 

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Todays trip was 21.8 mpg in 236.4 highway miles. Speeds 67-70mph 99% of the trip. Very nice considering. 4 people in tow 2 adults and 2 kids. 4 days of clothes for all. 13x13 pop up tent, foldout chairs, camera gear, metal detectors, yeti and another cooler, fishing poles and tackle. Truck has a camper shell. Decked bed drawer system.
3.5 eco
3.55 rear
Fx4
Without all this stuff in the truck I have had mpg on trips averaging 26.5 and 27.5 were my best trips. Now I set the cruise at 65 and didn't touch it. But honestly that is not easy to do because I don't drive like that. I was only able to keep my foot off the gas just to see how good it can do.
Thanks for reading.


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I have the generic gauges, unlike you guys... Jealous! Plus my air bag clock spring is out so I cant access anything but trip 1 :( Don't suppose there's another way to do mpg without refueling and using a calculator?
 

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2018 screw 4x4, 3.5L EcoBoost, 10 spd, 3.55 final. 16 mpg to and from work if I'm conservative. 9 miles each way, 6 of them on a highway.

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Update: Towed a 6500lb trailer from Portland (275 ft elevation) over a 4810 ft pass to a 4000 ft campground, and back. Averaged 11.6 mpg. The best part was watching the tranny downshift on the downhill parts.

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My mileage since last Tuesday. Normal week until Friday, trip to northern Michigan (a little hilly), not bad at all.

2015 SCREW, 3.55, 3.5 EB, 275/60-20's, SCT87 perf tune, 2" level



 

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2018 3.5 EcoBoost, 10 speed, 3.55 final, 4x4, 5 1/2' bed, Platinum, max tow pkg. Portland to Anacortes WA on I-5 with 2 passengers and no trailer, 20.5 MPG. Probably could have eeked out 21 if not for stop-and-go traffic in Seattle. On a Saturday.

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I have a 2015 Platinum with the 3.5 V6. I just ran straight 250 miles of Michigan highway with cruise set at 79 MPH and got a whopping 17.4mpg. I was quite disappointed until reading thru some of these threads. Apparently mileage totally tanks above 65mph. I'll have to try it again some day and stay in the right lane while folks honk at me to get off the highway. :)
 

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Funny post.

The 3.5 takes a beating on its mpg. For whatever reason, beyond the fact that our trucks are like a 4x8 sheet of plywood plowing through the air, the 3.5 will use boost to avoid dropping a gear when cruising along at high speeds.

Boost = non-eco
It's the Hyde of the Jekyll Hyde dual personality of this motor.

Try locking out a gear and using rpms with less boost? Sometimes the mpg increases substantially.

Those of us towing with tuner-gauges and monitoring these parameters for many hours on long trips.... we have the luxury of trying little things like this and watching the results.

Most tricks should translate over to empty truck cruising to some extent.

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lifetime combined @ 145.000 miles is 19mpg.

last road trip 250 miles solo drive 22.5mpg

last camping trip, 3 people, bed full of gear, 730 miles road trip from 0 to 3000 ft elevation and back to 0. plus 20 miles of trails at a speed of 5-10mph going from 3k elevation to 8500 to a ghost town in cerro gordo, CA. so 750 miles total. I got 20.2mpg, confirmed on fill up.
 

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Yeah, really interesting question. In my 2014 F150 super crew 3.5L EB I typically get 15.5 (80 mph)- 18.2 (65 mph) on premium gas at 6,500 feet above sea level in Colorado, but Shell premium is definitely better than Costco premium. My problem is I've recently got the dreaded wrench indicator with problem P2112 showing with my FIXD app (throttle actuator control system...stuck closed). When that comes on (temporarily, goes away after 10 minute driving), my mileage goes to 14 mpg and there's smoke when I start up. Not healthy...hope it doesn't require replacement of the electronic throttle.
 

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Yeah, really interesting question. In my 2014 F150 super crew 3.5L EB I typically get 15.5 (80 mph)- 18.2 (65 mph) on premium gas at 6,500 feet above sea level in Colorado, but Shell premium is definitely better than Costco premium. My problem is I've recently got the dreaded wrench indicator with problem P2112 showing with my FIXD app (throttle actuator control system...stuck closed). When that comes on (temporarily, goes away after 10 minute driving), my mileage goes to 14 mpg and there's smoke when I start up. Not healthy...hope it doesn't require replacement of the electronic throttle.
I think this is fairly common to have the throttle go. I think its the actuator on the throttle body usually, not the pedal.
 

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2018 Lariat SuperCrew with the 3.5L Ecoboost and 3.55 gears - just drove from east side of Baton Rouge (far side) to downtown Houston this afternoon. Hit a couple areas of traffic on I-10 and also the two city stretches, of course. This was my first real road trip, as my truck had 950 miles on it when I set off. Just got the oil changed for the first time at 900mi. I've also got an Extang Solid Fold 2.0 bed cover on the bed for the trip (bed is filled with suitcases). 4 people in the truck (two adults and two kids with carseats).

I got 23.7 combined average (from my driveway to the hotel) with the cruise set on 79 mph whenever traffic allowed. Can't complain about that...
 

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I usually calculate using Imperial Measurements. Was getting a pretty consistent 20.5-21 Imperial MPG+, but with cooler weather, it has dropped. The worst has been 15.5 L/100 kilometers, around 18.2 mpg Imperial, which is about 15.2 MPG in US gallon conversion. The best has been about 13 liters/ 100 km which converts to about 18.1 MPG U.S Gallon, or 21.7 Imperial.

My average is usually around 13.4 l/100 km, 17.6 MPG US/ or 21.0 Imperial MPG. I think I am doing pretty good if I can keep it above 20 imperial MPG.

I have a 2018 F150 3.5 Ecoboost, Supercrew, 302A 4X4 Sport with the 6.5 foot box, maxtow pkg. It is 100% stock with the LT275/65R18 tires. It has the 3.55 gears

From Saskatchewan Canada, not much elevation changes, around 2000 (+- 100) feet above sea level

not sure how most of you seem to get better fuel economy south of the border. All my calculations have been empty, haven't towed anything yet or hauled anything more than an ATV in the box.
 
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