2013 Ecoboost mpg
06-19-2018, 02:13 PM
#11
Yes, and yes.
I spent a lot of time searching all the threads out there specifically on the fuel mileage hit when I was contemplating a leveling kit and oversize tires. Seems a 1-2 mpg hit from a lift is common, and a 1-2 mpg hit from larger tires is common. I drive 20k miles a year, so a 2-4 mpg loss was enough to stop me from changing my trucks stance.
The lift hurts your aerodynamics and forces your truck to work harder to push air out of the way. You're letting more air under the truck which creates more drag on all the nooks and crannies down there. There's a reason modern trucks have those huge air damns that lower your ground clearance.
The larger tires hurt in three ways ways; 1) they are heavier and make your engine work harder to turn them. 2) they have a larger diameter and make your engine work harder to turn them. 3) they often have all terrain or mud terrain tread patterns with higher rolling resistance, which yep, makes your engine work harder to turn them.
I spent a lot of time searching all the threads out there specifically on the fuel mileage hit when I was contemplating a leveling kit and oversize tires. Seems a 1-2 mpg hit from a lift is common, and a 1-2 mpg hit from larger tires is common. I drive 20k miles a year, so a 2-4 mpg loss was enough to stop me from changing my trucks stance.
The lift hurts your aerodynamics and forces your truck to work harder to push air out of the way. You're letting more air under the truck which creates more drag on all the nooks and crannies down there. There's a reason modern trucks have those huge air damns that lower your ground clearance.
The larger tires hurt in three ways ways; 1) they are heavier and make your engine work harder to turn them. 2) they have a larger diameter and make your engine work harder to turn them. 3) they often have all terrain or mud terrain tread patterns with higher rolling resistance, which yep, makes your engine work harder to turn them.
06-19-2018, 02:58 PM
#12
Senior Member
...
The larger tires hurt in three ways ways; 1) they are heavier and make your engine work harder to turn them. 2) they have a larger diameter and make your engine work harder to turn them. 3) they often have all terrain or mud terrain tread patterns with higher rolling resistance, which yep, makes your engine work harder to turn them.
The larger tires hurt in three ways ways; 1) they are heavier and make your engine work harder to turn them. 2) they have a larger diameter and make your engine work harder to turn them. 3) they often have all terrain or mud terrain tread patterns with higher rolling resistance, which yep, makes your engine work harder to turn them.
06-19-2018, 07:56 PM
#14
Senior Member
Above 70 mph is like hitting a brick wall. My 14 Supercrew 4X4 with the 5.0 will give me 21 mpg with the cruise control set on 70 on interstate drives. At 75 and faster 18 mpg is the best I can do. I'm using a slightly taller, but narrower than stock tire with an All Terrain tread and stock suspension. Your tires have much more rolling resistance, the lift hurts aerodynamics and driving that fast all add up to poor fuel mileage. Just dropping down to about 70 mph as your top speed will probably give you 2-3 mpg.
06-20-2018, 09:23 AM
#15
Above 70 mph is like hitting a brick wall. My 14 Supercrew 4X4 with the 5.0 will give me 21 mpg with the cruise control set on 70 on interstate drives. At 75 and faster 18 mpg is the best I can do. I'm using a slightly taller, but narrower than stock tire with an All Terrain tread and stock suspension. Your tires have much more rolling resistance, the lift hurts aerodynamics and driving that fast all add up to poor fuel mileage. Just dropping down to about 70 mph as your top speed will probably give you 2-3 mpg.
Going 75, however...I might hit 18-19 on the same trip. I just take off a few minutes earlier if on a schedule and cruise. Doesn't bother me and honestly, I find myself passing others just as much as I get passed, which surprised me when I first started this method.
06-20-2018, 09:58 AM
#16
Senior Member
as I said, it's perfectly normal.
06-20-2018, 05:39 PM
#17
Senior Member
Above 70 mph is like hitting a brick wall. My 14 Supercrew 4X4 with the 5.0 will give me 21 mpg with the cruise control set on 70 on interstate drives. At 75 and faster 18 mpg is the best I can do. I'm using a slightly taller, but narrower than stock tire with an All Terrain tread and stock suspension. Your tires have much more rolling resistance, the lift hurts aerodynamics and driving that fast all add up to poor fuel mileage. Just dropping down to about 70 mph as your top speed will probably give you 2-3 mpg.
2 recent tow experiences:
27' Layton TT, app 6800lbs, Two tows app 300mi each. Averaged 11.9 mpg overall. Truck towed trailer just fine.
12' U-haul open trailer w/ HD Dyna Wide Glide and BMW K1200S. 3800lbs total tow weight. 600mi tow. Averaged 13.2mpg.
Anything over 70mph (1600rpm) and mileage goes south in a big hurry. I think a lot of it has to do with aerodynamics. These rigs aren't streamlined to begin with. As speed increases, wind resistance increases exponentionally.
06-20-2018, 06:04 PM
#18
F150 Forum
Having larger tires on the truck usually hurts MPG and performance a bit form the larger rotating mass. Have you ever considered custom tuning? We offer some phenomenal tunes for these EcoBoost trucks that help to improve performance and most customers also report an average of 1 to 2 MPG better than stock, some even more. We offer towing tunes, performance tunes, MPG tunes, and even more aggressive tunes for things like race fuel and E-85 with the correct supporting modifications. Our Mycal tuning device also allows you to adjust the tire size and gear ratio calculations in case your truck was not calibrated for the correct tire size which could throw off the average MPG calculator and odometer as well.
Another thing many EcoBoost owners are not taking into account is that these 3.5L Engines were really designed for use with 91 plus octane premium fuel as mentioned in the owners manual. This is especially so on when using the truck for sever duty use including towing and hauling. So running low octane has been proven to lose anywhere from 12%-15% of Ford's advertised HP ratings and the mileage suffers on low octane as well. This is because the engine has to pull back power based off of knock counts and many other reports when it's ran on low octane fuels. So often times stepping up to premium fuel alone can help the MPG, and then a custom tune for premium fuel could take it up even higher as well.
Here's a link to the tuner on our website for more information as well. https://www.livernoismotorsports.com/product/LPP631102
Another thing many EcoBoost owners are not taking into account is that these 3.5L Engines were really designed for use with 91 plus octane premium fuel as mentioned in the owners manual. This is especially so on when using the truck for sever duty use including towing and hauling. So running low octane has been proven to lose anywhere from 12%-15% of Ford's advertised HP ratings and the mileage suffers on low octane as well. This is because the engine has to pull back power based off of knock counts and many other reports when it's ran on low octane fuels. So often times stepping up to premium fuel alone can help the MPG, and then a custom tune for premium fuel could take it up even higher as well.
Here's a link to the tuner on our website for more information as well. https://www.livernoismotorsports.com/product/LPP631102
06-23-2018, 12:12 PM
#19
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THX everyone, sorry was out of town for the a bit.
Sounding like I am where I should be with the setup. Didn't think 70 to 75 mph made that much of difference but will give it a try as well.
Will consider taking the lift of and switching the tire size, it sounds crazy to me now, but I could almost careless about a lift and bigger tires these days. Would much rather have the better mpg. I do still tow a heavy load occasionally so would probably stay with a LT tire. Now need to decide if the 20" wheel, 17", or 18" wheel is the way to go. Does one with the stock tire size weigh significantly less and help with the mpg?
At first wasn't considering a tune, but may consider that.... still pretty hesitant on that. Thought my days of performance mods were behind me. Really doesn't interested my unless it helps my mpg or keeps it the same and gives me some more torque/power that will put less of a load on things when towing(which I assume would help mpg or at least put less strain/wear on stuff)
Sounding like I am where I should be with the setup. Didn't think 70 to 75 mph made that much of difference but will give it a try as well.
Will consider taking the lift of and switching the tire size, it sounds crazy to me now, but I could almost careless about a lift and bigger tires these days. Would much rather have the better mpg. I do still tow a heavy load occasionally so would probably stay with a LT tire. Now need to decide if the 20" wheel, 17", or 18" wheel is the way to go. Does one with the stock tire size weigh significantly less and help with the mpg?
At first wasn't considering a tune, but may consider that.... still pretty hesitant on that. Thought my days of performance mods were behind me. Really doesn't interested my unless it helps my mpg or keeps it the same and gives me some more torque/power that will put less of a load on things when towing(which I assume would help mpg or at least put less strain/wear on stuff)
06-25-2018, 10:04 AM
#20
THX everyone, sorry was out of town for the a bit.
Sounding like I am where I should be with the setup. Didn't think 70 to 75 mph made that much of difference but will give it a try as well.
Will consider taking the lift of and switching the tire size, it sounds crazy to me now, but I could almost careless about a lift and bigger tires these days. Would much rather have the better mpg. I do still tow a heavy load occasionally so would probably stay with a LT tire. Now need to decide if the 20" wheel, 17", or 18" wheel is the way to go. Does one with the stock tire size weigh significantly less and help with the mpg?
At first wasn't considering a tune, but may consider that.... still pretty hesitant on that. Thought my days of performance mods were behind me. Really doesn't interested my unless it helps my mpg or keeps it the same and gives me some more torque/power that will put less of a load on things when towing(which I assume would help mpg or at least put less strain/wear on stuff)
Sounding like I am where I should be with the setup. Didn't think 70 to 75 mph made that much of difference but will give it a try as well.
Will consider taking the lift of and switching the tire size, it sounds crazy to me now, but I could almost careless about a lift and bigger tires these days. Would much rather have the better mpg. I do still tow a heavy load occasionally so would probably stay with a LT tire. Now need to decide if the 20" wheel, 17", or 18" wheel is the way to go. Does one with the stock tire size weigh significantly less and help with the mpg?
At first wasn't considering a tune, but may consider that.... still pretty hesitant on that. Thought my days of performance mods were behind me. Really doesn't interested my unless it helps my mpg or keeps it the same and gives me some more torque/power that will put less of a load on things when towing(which I assume would help mpg or at least put less strain/wear on stuff)
As to the tune, I didn't see any mileage gains when I installed mine, I spent 4 weeks driving each tune I purchased (87 tow/perf, 89 tow/perf, 93 tow/perf, 93 performance) and my mileage stayed pretty flat through them all. There are certainly power gains though, and they are very noticeable with the high octane tunes. Of course, the cost of high octane fuel is going to hurt your wallet.