Kenferg1

I just finished a 6,000 mile tour from Tennessee west to Utah, Wyoming and back. About 5500 miles was towing. I averaged 11.2 mpg (truck computer) going out, and 11.4 coming back. Overall I had a 12.2 mpg combined. I burned the highest octane fuel during the trip. I'm not certain if this helped the mileage much. But given that I had to fight headwinds going out and coming back I'm very happy with the mpg. BTW, there wasn't anything that my EB would not pull. That 3.5 TT is an *** kicking engine!

smokeywren

Another trip last week, about 300 miles each way to Wichita Falls. High headwinds both directions because of a storm with north winds going north and the normal south headwind coming home. The new 36-gallon tank helped, but it was barely big enough to get all the way to the campground in Iowa Park because we got about 7.3 MPH on regular gas driving 62 MPH. The return trip had a bit less headwind and we got about 7.8 MPG.

Earlier trips showed that premium gas improved MPG by about one MPG. That's enough to cover the extra cost of premium, but I forgot to fill up with premium when I had the new gas tank installed, so we left here with a full tank of regular. We were almost home when we filled up with premium in Big Spring. (They had premium for the same price as regular because they ran out of regular. So I took advantage and filled up with about 33 gallons of premium. But too late the affect the MPG for the towing trip.

We'll be leaving again soon for a long trip to Idaho, so I'll try to remember to use only premium on that trip. L8r.

Buck50HD

We hit our all-time low last time out. Wind so bad the trees were bent over and all you could see was the lighter colored underside of the leaves. Dust storm coming down every gravel road. I've been running 87 E10 the last few trips to see if there is a difference. With a combination of wind and 87E10, we were down to 8.6 mpg. Best I've gotten with 87 E10 is 11.3 for a 2 hr trip.

Normal boost with this rig is around 2psi with no wind and 10-5-11 mpg. When we got the 8.6mpg, it was running 5-7psi boost at 2100 RPM.

Also, from what I can tell, the ignition timing (scangaugeII) is not affected by running 87 E10 at normal towing RPM. Same timing, even at peak boost (10.5psi) at 2100 in 5th gear up a grade. That's all the boost it will make at 2100 RPM. Can't tell you what the timing is at WOT while passing because as soon as you kick it down, it's time to hang on and watch the road. Premium or not, this thing hauls. My guess is that they dump fuel at it or adjust injection timing before modifying ignition timing but I could be wrong. I can tell the mileage is down slightly with 87, likely due to the ethanol content. Power doesn't seem a whole lot different.

allmotor408

I just towed around 240 miles round trip with my 2013 F150 5.0 4x4. I averaged 13.8 mgp. Towing approx, 5000 lbs and averaging around 70-75 mph on the hwy.

jcain

That's helpful. If it was a boat, meh.

superdave150

Consider this...

I have a good friend who started driving deuce-and-halfs when he was 16 and retired from driving 18 wheelers when he was 66 (do the math). He tells me that, when pulling a big box trailer, slowing down from 65 to 60 can gain 20-25% MPG. If you have the patience.

Also he has both a V8 4WD Explorer and a diesel 4WD SuperDuty he uses to tow a large bass boat. I asked him what kind of comparative MPG he gets with each towing the boat. He laughingly said, "Fourteen with either, but with the turbo-diesel I can go as fast as I want."

J.Manning

I have an 04 5.4 super cab with 373 gears and get around 8 mpg towing my 27 ft TT weighing in at 7200 lbs with my water and propane tanks full. This is about a 5 mpg drop from my 13 mpg mty.

b727capt

Added an Edge CTS tuner to my 2010 F150 Lariat Screw 5.4, 3.55 longbox towing a 37' 8500# TT and have been averaging 10.5-11.4 towing at 60-65 MPH. The tuner brought my towing mileage up about 1-1.5 MPG.

Mechanik

I've been playing with my Edge on the bare truck and have mileage up about 2 MPG overall. Hoping that towing will see around 1 MPG improvement. Here in CA we don't have a choice on ethanol content as it's blended at the refinery, and I'm seeing on this site that our standard 87 octane ethanol mixture drops our MPG a good 15-20%. The Edge is supposed to be specially calibrated for CA gas, but I'm guessing that there is no way to compensate fully for the lower energy content.

Filtermann

Pulling a 2011 Wildcat 28RKS , 8000 lb dry weight, with a 2012 7700LB GVW F150 Screw 6.2 373 gears 6 Spd Trans Max Tow package. Fully loaded GCVW is 16200 lbs ( just under factory spec by a few 100 lbs). I pull in the mountains of BC so it's always up or down . Just did a trip into the Shuswap Lakes region from the coast and got 9.8 mpg on the east bound trip and 10.3 westbound so pretty happy with that considering overall weight and terrain. Tow speeds vary because of huge climbs but never exceed 100kph (63mph). BTW, the tow haul feature is unbelievable for holdback on these big descents!!!