I’m on my second company truck with the 3.5 eco-boost. They have been extremely reliable motors for me. My father has one and my brother still has his 2011 model. Both of mine were tuned and so was my brothers.
My tires are 10 ply and just a hair over 34 inches tall. I have a 2 inch lift with the front air dam removed and I’m always caring five or 600 pounds of tools and parts in the back. I drive about 50,000 miles a year and it’s no problem to get over 20 miles to the gallon with my set up. I know it would do better if I didn’t opt for the bigger tires and lift. My tires are 10 ply and just a hair over 34 inches tall. I have a 2 inch lift with the front air dam removed and I’m always caring five or 600 pounds of tools and parts in the back. I drive about 50,000 miles a year and it’s no problem to get over 20 miles to the gallon with my set up. I know it would do better if I didn’t opt for the bigger tires and lift.
I’m also pulling a company trailer all over the southeast as well. Just over the next three weeks I will have about 40 hours of towing with a large enclosed trailer. I know that my next vehicle will be another eco-boost 3.5 because I have fallen in love with this motor.
As far as fuel mileage, it is true that when the turbos are building boost it uses fuel more quickly but if you drive it conservatively and just two or 3 miles over the speed limit it will do very good. This Picture is from this week on a trip where I was fully loaded in the bed and had to put more tools and parts in the back seats but I was on a long drive to a customers location where most of the roads allowed me to only travel about 60 or 62 miles an hour in the 55 mph speed limit.
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This trip included a lot of stop and go traffic through the cities and not shutting it off in the drive-through or at the gas station.
The only complaint I have about the motor is for uses a 205° thermostat which keeps the truck running at about 210°. I put in 170° thermostat and keeps the truck a lot cooler when towing.
My father traded in his 5.0 on the eco-boost he has now. It was a good motor and a pleasure to drive because the sound is really good but it’s lack of low-end torque reared its ugly head every time we hooked up to the trailer with the tractors or hauling anything else.
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2017 with the max tow package and heavy springs in the rear.