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I know there are a lot of factors in fuel economy , but I drive a pretty even split of city/highway and usually am right on with the combined sticker fuel economy. But with this new truck, I'm only at 18 mpg. Way below the 22 advertised. I only have 2000 miles on it so far. Maybe it will get better with more break in, but I'm a little concerned.
We get 18.5 around town, and in the 21 MPG neighborhood when we are on the highway. This is a 2015 3.5L EcoBoost super crew, with the 6-1/2 foot box (157" wheelbase). It's a lot of truck to even see over 20 MPG.
I’ve honestly never seen MPG’s improve as the engine breaks in and a growing portion of me is thinking this is just a myth. You are right, there are many factors that go into the truck’s performance. The biggest factor for me that typically seems to be ignored is the fact the EPA testing is not real world.
If your mileage improves with miles, then that’s good. But don’t hope for it.
I know there are a lot of factors in fuel economy , but I drive a pretty even split of city/highway and usually am right on with the combined sticker fuel economy. But with this new truck, I'm only at 18 mpg. Way below the 22 advertised. I only have 2000 miles on it so far. Maybe it will get better with more break in, but I'm a little concerned.
I wouldn`t say that you`re way below 22 MPG since you said that you`re now getting 18 MPG.
Also as you said, you only have 2K miles on the odometer.
Driving 55-60 MPH on the interstate plus your normal city driving will get you the best MPG`s.
I`m currently at 22 MPG combined on my 2016 Lariat with the 5.0 an 2WD with a little more than 35K miles.
Give it some time and miles. I personally don't think 2000 miles is enough to judge. I have logged every mile in my truck. I have also changed the lie o meter on dash. I will post a link to my milage on fully dot com. Had the truck over a year and it has over 31000 miles. Blue (Ford F-150) | Fuelly
Edit to add my truck is NOT flex fuel. Was the only choice I had on fuelly.
Last edited by RegCab; Mar 4, 2019 at 06:24 PM.
Reason: Flex fuel
Do you drive long enough for the engine and transmission to get up to operating temperature? Trips less than a few miles don't allow the engine to get out of closed loop, where the mixture is more rich until the temp is up. Short trips, especially stop and go, kill fuel mileage.
MPG threads always crack me up. Absolutely no disrespect to the OP who said nothing like I normally read... “Yeah, I’m getting 25mpg driving 75mp... blah, blah, blah”. The best mpg’s will never come from non-sustained driving, and at speeds in excess of 55mph. I realize some vehicles have “sweet spots” where they really seem to run great, but the reality is, the best mpg’s aren’t there.
For every mile per hour over 55mph, an engine will lose mpg. I don’t recall the figure, but it drops. After about 3 million miles, I find this is true and has been for just about ever, but I only have tried it on a couple dozen trucks. If everyone could hop on the interstate and drive 55mph, keeping off the brake, mpg’s would soar. I’ve never seen anyone really beat mpg’s with cruise control on non-mountainous terrain unless they play the hills... and that’s subjective. Similarly, I can’t remember when mpg’s ever increased with a modern gas mill. With my diesels, they increased, but it took about 100k.
MPG threads always crack me up. Absolutely no disrespect to the OP who said nothing like I normally read... “Yeah, I’m getting 25mpg driving 75mp... blah, blah, blah”. The best mpg’s will never come from non-sustained driving, and at speeds in excess of 55mph. I realize some vehicles have “sweet spots” where they really seem to run great, but the reality is, the best mpg’s aren’t there.
For every mile per hour over 55mph, an engine will lose mpg. I don’t recall the figure, but it drops. After about 3 million miles, I find this is true and has been for just about ever, but I only have tried it on a couple dozen trucks. If everyone could hop on the interstate and drive 55mph, keeping off the brake, mpg’s would soar. I’ve never seen anyone really beat mpg’s with cruise control on non-mountainous terrain unless they play the hills... and that’s subjective. Similarly, I can’t remember when mpg’s ever increased with a modern gas mill. With my diesels, they increased, but it took about 100k.
Can't disagree, My 2011 FX4 5.0L F-150 gets low 20's at 60mph but if I drive between 75 or 80 which is highway speed here in Texas it drops to high teens and that's assuming I don't have a headwind and I'm mostly flat ground. I'm not knocking it, I feel as though it does pretty respectable for a fullsize 4WD V8 truck, but the best way to get the best MPG is the slow down lol.
I have the same truck as you and am also getting around 18 mpg. I bought it in November 2017 and only have 2400 miles on it so far so it would be nice if the mileage would increase but I'm not holding my breath. Got a pic of yours? Good luck with it....
I’ve honestly never seen MPG’s improve as the engine breaks in and a growing portion of me is thinking this is just a myth. You are right, there are many factors that go into the truck’s performance. The biggest factor for me that typically seems to be ignored is the fact the EPA testing is not real world.
If your mileage improves with miles, then that’s good. But don’t hope for it.
I think it is less of a factor now than, say, 20+ years ago. Back then they actually had a break-in period and loosened up over time. Today, every new car is expected to go right into service for a soccer mom or a rental car company or a contractor and not need any special treatment. I know a few still mention proper break in but it's minimal compared to the olden days. So "myth"? My opinion is no, but much less true on today's cars than our ancestors' cars.
I've got 15k miles on my 2018 3.3, and in town 17-18 is common, in the 20s for mixed, and on highway i have seen 24-26 mpg on long distance drives. I'm ok with the mileage for a full-size pickup!
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