for those of us with ecoboosts getting less than advertised mileage.
07-10-2012, 07:32 AM
#51
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I drive a mix of highway and around town getting 17 hand calculated. Could no be happier but i also was counting on 16 when bought the truck. I look at it like this I have all most as much power as 6.2 but I'm getting 16 mpg not 12. I think people are expecting to much out of a full size truck. People who run out and buy a new truck because it's gets better mpg are nuts. The money it cost you to get a new truck I bet could have paid for many years of fuel.
However, I did buy this particular new truck/engine combination over other new truck options in large part because of the power/mpg of the EcoBoost.
07-10-2012, 08:49 AM
#52
Senior Member
I drive a mix of highway and around town getting 17 hand calculated. Could no be happier but i also was counting on 16 when bought the truck. I look at it like this I have all most as much power as 6.2 but I'm getting 16 mpg not 12. I think people are expecting to much out of a full size truck. People who run out and buy a new truck because it's gets better mpg are nuts. The money it cost you to get a new truck I bet could have paid for many years of fuel.
Its hard to compare mileage reports with different people because there are so many climate and condition differences between everyone. But when you have a benchmark in the same conditions, and the truck isn't meeting the benchmark it did before, there ARE issues!
/rant
07-10-2012, 10:21 AM
#53
Official Member: Vast RWC
07-10-2012, 10:38 AM
#54
On my F150 EB, I can see a 1-2 MPG drop going to anything under 93 Octane, from the same station, or any other station. My driving habits don't change from one grade to another, but I can see a marked difference all around going to a lower grade fuel. As an experiment I added a little over half tank of 89 after several tanks of 93, when MPG's improved, by the time I was halfway through that tank, MPG dropped down to under 17 from over 18.5, and it took two more fills of premium to get it back up to 18.
On my other cars, the Flex and Veracruz, the MPG increase with Premium was less than 1 MPG, still an increase, but not enough to justify using it. Both of those vehicles, the Flex being EB and the Veracruz V6, were ODBII and had the fuel management systems that can detect octane and adjust accordingly.
So Octane can play a part in MPG, just depends on what you are running and how sensitive the engine is to it. Apparently the F150 EB is very sensitive to it.
07-10-2012, 04:56 PM
#55
I drive a mix of highway and around town getting 17 hand calculated. Could no be happier but i also was counting on 16 when bought the truck. I look at it like this I have all most as much power as 6.2 but I'm getting 16 mpg not 12. I think people are expecting to much out of a full size truck. People who run out and buy a new truck because it's gets better mpg are nuts. The money it cost you to get a new truck I bet could have paid for many years of fuel.
I was fairly happy with my truck's mileage when I got it. (18.5-19) so I got one for my wife too. Then winter came and my mileage dropped to 17.5, and hers never got over 16.4 from the outset. Summer came and mine went back up to 19 and hers remained at 16. So, SOMETHING is wrong with SOME of these trucks, and I'm trying to find out what, instead of endlessly bitching about it.
By the way, I ran premium all winter, with no increase in mpg, and before our trip to Louisiana I had switched to an 87 octane tune and begun running 87 for 500 miles. I then unloaded the tune and drove the 1000 miles to LA, using 87, 88, or 89 octane (depending on what was available). I noticed no difference when switching from 91 to 87, and no difference running the tune vs not for the last 500 miles of running it tuned. I had a 500# motorcycle in the back and got 2mpg better than my wife for the whole run.
07-10-2012, 06:40 PM
#57
I have had 4 trucks in the last 7 years. I just like having a new truck and each truck has never got what the sticker mpg stated. Why manufactures test the truck under ideal conditions. When I bought this truck I got on a few forums and found out what the real numbers are. What I found was if you have the max tow it's around 16 and with out is 18. Three people at work have ecos and they are right on the money with those numbers. How about this you find me a non diesel truck with the same power as the Eco getting around 16. Plus ford states for a Eco 4x4 15 city and 21 highway durning optimal conditions.
07-10-2012, 07:02 PM
#58
sorry to post again but after some thought I came up with what may be causing peoples mpg to be different then say your wife's. The Trans in theses trucks are adaptive learning. Meaning the adapt to your driving style. This may or may not be the issue but I would reset the learning state then switch trucks for a few months to see if it is I fact driving styles causing your issue. My cousin has a Eco getting 14 and it's all I hear about but when I ride in the truck with him it is clear why. His foot was cast in lead but if you ask him. He will tell you oh no I drive like a little old lady and it's the trucks fault. He loves to speed right up to a red light. I have asked him if he has ever thought of letting off the gas when he sees a red light but he looks at me like I'm crazy. I believe most mpg issues are driving style. I said most not all good luck.
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Poacher (07-13-2012)
07-10-2012, 07:53 PM
#59
Senior Member
Actually it does make a difference. If you put high octane in a car that doesn't need or require it, MPG can go down, especially in an older car that is pre OBDII. I had a 92 Crown Vic that ran best and got the best MPG on 89, but go either higher or lower and MPG dropped.
On my F150 EB, I can see a 1-2 MPG drop going to anything under 93 Octane, from the same station, or any other station. My driving habits don't change from one grade to another, but I can see a marked difference all around going to a lower grade fuel. As an experiment I added a little over half tank of 89 after several tanks of 93, when MPG's improved, by the time I was halfway through that tank, MPG dropped down to under 17 from over 18.5, and it took two more fills of premium to get it back up to 18.
On my other cars, the Flex and Veracruz, the MPG increase with Premium was less than 1 MPG, still an increase, but not enough to justify using it. Both of those vehicles, the Flex being EB and the Veracruz V6, were ODBII and had the fuel management systems that can detect octane and adjust accordingly.
So Octane can play a part in MPG, just depends on what you are running and how sensitive the engine is to it. Apparently the F150 EB is very sensitive to it.
On my F150 EB, I can see a 1-2 MPG drop going to anything under 93 Octane, from the same station, or any other station. My driving habits don't change from one grade to another, but I can see a marked difference all around going to a lower grade fuel. As an experiment I added a little over half tank of 89 after several tanks of 93, when MPG's improved, by the time I was halfway through that tank, MPG dropped down to under 17 from over 18.5, and it took two more fills of premium to get it back up to 18.
On my other cars, the Flex and Veracruz, the MPG increase with Premium was less than 1 MPG, still an increase, but not enough to justify using it. Both of those vehicles, the Flex being EB and the Veracruz V6, were ODBII and had the fuel management systems that can detect octane and adjust accordingly.
So Octane can play a part in MPG, just depends on what you are running and how sensitive the engine is to it. Apparently the F150 EB is very sensitive to it.
I have personally tested both octanes in my Ecoboost and did the same in my old Tundra and Lightning. And much like goodbourbon, I got the same result every time: no change. My Ecoboost just got nearly 24 mpg over 2400 miles carrying a load, running 87 E10 and a little pure gas 87. Are you telling me I would have gotten 26 mpg if only I had run 93? I highly doubt it, seeing as how my mileage is already higher than nearly every one else, including those running 93. Even Ford says that 93 only helps in certain situations, namely citing heavy loads in hot weather. Note that my trip was across La, Ms, Al, and Fl in June, so hot weather we had.
One thing is for sure, though. Most of the people who disagree with this have already made up their minds and will argue forever that I'm just talking theory and that it doesn't apply to their trucks.
Last edited by engineermike; 07-10-2012 at 08:00 PM.
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amerendino (10-25-2015)
07-10-2012, 07:56 PM
#60
Senior Member
Once I read and understood the EPA driving schedule used in the testing, I was much less critical, though.