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Joined: Sep 2014
Posts: 582 Likes: 1
Campfire Regular
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Campfire Regular
Joined: Sep 2014
Posts: 582 Likes: 1 |
I had a Chevy with that, my main current ride is a Subaru Forester. (go ahead, bring on the gay jokes...LOL)
The Chevy mileage calculator was about 10 % optimistic. Subtract about 10 % of the reading and you were in the ballpark.
Subaru is in the 5-8 % range over what is achieved in real life.
If the Chevy said 30 MPH, it was more like 27. Subaru says 36, more like 34 or thereabouts. Most people are too lazy to figure the real mileage out. Not to mention there would be some variance between gas pumps. I drive like the old man that I am, so it doesn't really matter with the 45 miles I drive per day during the week.
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Joined: Aug 2002
Posts: 2,584
Campfire Regular
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Campfire Regular
Joined: Aug 2002
Posts: 2,584 |
It’s irritating that Ford has the ability to make these readings accurate but chooses not to but at least they provided us the means to correct it.
There's a lot of variables in play and it's not surprising that calculated mpg differs a bit from actual mpg. A 6.7% error is not bad for the default setting. It's good that you can adjust the reading to make it a closer match. In order for Ford to get it closer, they'd have to do what you did; run a couple of tanks of gas through it, calculate actual MPG and then do the adjustment. Needless to say that's not practical for every vehicle they make with an MPG computer.
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Joined: Sep 2012
Posts: 2,613
Campfire Regular
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Campfire Regular
Joined: Sep 2012
Posts: 2,613 |
Ignore the computer and Google "internal combustion engine thermal efficiency."
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Joined: May 2003
Posts: 5,792
Campfire Tracker
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OP
Campfire Tracker
Joined: May 2003
Posts: 5,792 |
Side question: How did you like your Tundra? I’ve read their mileage sucks, not as capable for hauling heavy load as Ford or Dodge, but is much better on maintenance. Is this match your experience?
I had two different Tundras, a 2007 with the 4.7L and a 2010 with the 5.7. With the exception of the same major problem on both of them, they were extremely reliable. Both had air injection pump and air injection valve problems. The ‘07 was covered under warranty but the ‘10 was past that coverage so I traded it in on the F-150. Only 7300 miles on the F-150 so far so I don’t really know anything about its reliability but I can say that the 3.5 Ecoboost has more balls than the 5.7 Tundra did and pulls noticeably harder and gets noticeably better fuel milage. So far, so good. Back to the Tundra reliability. We’re it not for the air injection problems, I’d have nothing bad to say about them. Neither consumed or leaked a drop of fluids between oil changes all the way up to the 185,000 miles where I parted with them. John
If my people, who are called by my name, will humble themselves and pray and seek my face and turn from their wicked ways, then I will hear from heaven, and I will forgive their sin and will heal their land. 2 Chronicles 7:14
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Joined: Nov 2008
Posts: 2,608
Campfire Regular
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Campfire Regular
Joined: Nov 2008
Posts: 2,608 |
The mileage calculator in my 2014 with the 3.5 Ecoboost is accurate if you fill up, then drive on the freeway and get off and fill up again. It doesn't calculate in idling and winter warm ups.
Ron
People sleep peaceably in their beds at night only because rough men stand ready to do violence on their behalf. Orwell
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Joined: Jan 2003
Posts: 10,954
Campfire Outfitter
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Campfire Outfitter
Joined: Jan 2003
Posts: 10,954 |
I got a plain jane XLT -2013 3.7 and never seemed to sniff that >20 mpg as advertised. My current tires are a bit larger than factory so I am wondering what I really am getting?
BTW- I got Cooper MTP's that are ridiculously good in mud but as loud as they are good. Gonna have to change em out.
When a country is well governed, poverty and a mean condition are something to be ashamed of. When a country is ill governed, riches and honors are something to be ashamed of . Confucius
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Joined: Jul 2009
Posts: 5,183
Campfire Tracker
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Campfire Tracker
Joined: Jul 2009
Posts: 5,183 |
"My current tires are a bit larger than factory so I am wondering what I really am getting?'
Why didn't you have your speedo corrected when you got larger tires (or do it yourself)?
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Joined: Dec 2019
Posts: 17,222 Likes: 15
Campfire Ranger
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Campfire Ranger
Joined: Dec 2019
Posts: 17,222 Likes: 15 |
Even hand calculations have a variance in accuracy, the pump doesn't always stop at the exact same amount every time, even on the same pump. Hard to say which method is actually more accurate without some seriously accurate testing equipment. States sometimes have someone who goes around to verify that a gallon sold is actually a gallon... They check what once a year?
-OMotS
"If memory serves fails me..." Quote: ( unnamed) "been prtty deep in the cooler todaay " Television and radio are most effective when people question little and think even less.
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Joined: Nov 2018
Posts: 3,742
Campfire Tracker
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Campfire Tracker
Joined: Nov 2018
Posts: 3,742 |
Does calculating or reading it actually change anything? When it gets low you fill up. When it’s below zero you fill up at half a tank. Simple. Ed k
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Joined: Feb 2004
Posts: 46,745
Campfire 'Bwana
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Campfire 'Bwana
Joined: Feb 2004
Posts: 46,745 |
I have the baby eco-boost motor. Mine reads 19.4 MPG and my hand calc'd MPG is 19.2. So, it's either pretty accurate or someone did your steps already. I've tried to find reasons to not like this motor. But so far, I can't.
Camp is where you make it.
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Joined: Feb 2004
Posts: 46,745
Campfire 'Bwana
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Campfire 'Bwana
Joined: Feb 2004
Posts: 46,745 |
Most of the good old trucks never made 100000 miles and some of the new ones make 300000 plus. Old is old. Ed k Correct.
Camp is where you make it.
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Joined: Feb 2004
Posts: 46,745
Campfire 'Bwana
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Campfire 'Bwana
Joined: Feb 2004
Posts: 46,745 |
Most of the good old trucks never made 100000 miles and some of the new ones make 300000 plus. Old is old. Ed k You're right about that old is old but those classics sure look good and are still fun to drive. Here's mine, and I dont calculate the gas mileage, I just dont pass up a gas station. Love your truck sir!!
Camp is where you make it.
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