Notices
6.7L Power Stroke Diesel 2011-current Ford Powerstroke 6.7 L turbo diesel engine
Sponsored by:
Sponsored by:

The MPG question

 
  #1  
Old 03-09-2019, 02:10 PM
just another truck's Avatar
just another truck
just another truck is offline
Post Fiend
Thread Starter
Join Date: Feb 2007
Location: Sterling Heights,Mi
Posts: 10,428
just another truck has a superb reputationjust another truck has a superb reputationjust another truck has a superb reputationjust another truck has a superb reputationjust another truck has a superb reputationjust another truck has a superb reputationjust another truck has a superb reputationjust another truck has a superb reputationjust another truck has a superb reputationjust another truck has a superb reputationjust another truck has a superb reputation
The MPG question

A little history First, I had the almighty 7.3 for over 300,000. And with the help of the FTE world, I had a BTS trans, a Garret 38r turbo, split shot injectors, I had DP tunes, the Kwick 6637 airfilter and a 4" exhaust turbo back, modified High Pressure Oil Pump ( done before the injectors) . All in the quest of better Mileage. What I got was a Bad azz 1999 F 250 that served me well for 19 years, and the only gain I ever saw was a .5 mpg better after intake and exhaust.

I now own a 2011 F350 4x4 CC SB sitting with a 4" lift, 325x80x20 BFG AT stock. City appears to be around 14 and highway 15.7 ( based on Lie O Meter).. What kind of trouble can I get into here??
 
  #2  
Old 03-09-2019, 06:37 PM
Overkill2's Avatar
Overkill2
Overkill2 is online now
Elder User
Join Date: Mar 2017
Location: Western NY
Posts: 579
Overkill2 is gaining momentum as a positive member of FTE.
First off, welcome to the 6.7 section. I hope your truck serves you well.

Secondly, I don't take my truck's MPG calculations literally. They are usually lower than my hand calculated ones. If I were you, I would do some hand calculated mpg's and see where you are at compared with the truck ones.

You're lifted running 40 inch tires. What gears are you running? How much mileage are you looking for? I'm not trying to be a wise guy here but if you're looking to increase mileage on your truck, the simplest way would be going back to stock suspension and stock size tires. That would probably gain you some more miles to the gallon. Just saying. What exactly is it that you are trying to achieve here?

Just remember one thing... Being cool ain't cheap.
 
  #3  
Old 03-09-2019, 09:56 PM
SanDiego56
SanDiego56 is offline
Junior User
Join Date: Jul 2011
Location: San Diego
Posts: 74
SanDiego56 is starting off with a positive reputation.
Maybe plan your driving trips so they are all down hill...
 
  #4  
Old 03-10-2019, 04:33 AM
just another truck's Avatar
just another truck
just another truck is offline
Post Fiend
Thread Starter
Join Date: Feb 2007
Location: Sterling Heights,Mi
Posts: 10,428
just another truck has a superb reputationjust another truck has a superb reputationjust another truck has a superb reputationjust another truck has a superb reputationjust another truck has a superb reputationjust another truck has a superb reputationjust another truck has a superb reputationjust another truck has a superb reputationjust another truck has a superb reputationjust another truck has a superb reputationjust another truck has a superb reputation
Originally Posted by Overkill2 View Post
First off, welcome to the 6.7 section. I hope your truck serves you well.

Secondly, I don't take my truck's MPG calculations literally. They are usually lower than my hand calculated ones. If I were you, I would do some hand calculated mpg's and see where you are at compared with the truck ones.

You're lifted running 40 inch tires. What gears are you running? How much mileage are you looking for? I'm not trying to be a wise guy here but if you're looking to increase mileage on your truck, the simplest way would be going back to stock suspension and stock size tires. That would probably gain you some more miles to the gallon. Just saying. What exactly is it that you are trying to achieve here?

Just remember one thing... Being cool ain't cheap.
Love the quote, "being cool aint cheap".

So, I guess thats a great question, what am I looking for, honestly, probably an excuse to start moding the truck, as far as cool, to old for that.. now it is just about having fun..
 
  #5  
Old 03-10-2019, 07:47 AM
jav_eee
jav_eee is offline
Senior User
Join Date: May 2017
Posts: 488
jav_eee is gaining momentum as a positive member of FTE.jav_eee is gaining momentum as a positive member of FTE.
Originally Posted by Overkill2
Secondly, I don't take my truck's MPG calculations literally. They are usually lower than my hand calculated ones.
I find the opposite to be the case with mine. My buddies too. Usually shows .5 mpg more than hand calculations.
 
  #6  
Old 03-10-2019, 08:56 AM
just another truck's Avatar
just another truck
just another truck is offline
Post Fiend
Thread Starter
Join Date: Feb 2007
Location: Sterling Heights,Mi
Posts: 10,428
just another truck has a superb reputationjust another truck has a superb reputationjust another truck has a superb reputationjust another truck has a superb reputationjust another truck has a superb reputationjust another truck has a superb reputationjust another truck has a superb reputationjust another truck has a superb reputationjust another truck has a superb reputationjust another truck has a superb reputationjust another truck has a superb reputation
Originally Posted by jav_eee View Post
I find the opposite to be the case with mine. My buddies too. Usually shows .5 mpg more than hand calculations.
I know in the past, if you have a chip, it was best to do hand calculations..although, sometimes you just dont want to know the truth, based on a quick, I believe that at 65mph on my dash, I am doing about 67. I can start laying out the math here shortly and see what I am actually doing.
 
  #7  
Old 03-10-2019, 12:40 PM
Chuck-B's Avatar
Chuck-B
Chuck-B is offline
Elder User
Join Date: Jun 2017
Location: Woodbury CT
Posts: 852
Chuck-B is gaining momentum as a positive member of FTE.Chuck-B is gaining momentum as a positive member of FTE.
The huge factors are driving the speed limit (which this old man canít) and towing. My Ď13 gets 13.9 mpg but I canít keep it under 80. Just who I am. I had it up to 14.9 but something happens in my brain when Iím in the right or center lane and someone Ďgets aheadí of me. You donít wanna be with me when Iím in a traffic jam - lmao. The nice thing about being in your 60s is that you know most of your faults and could care less what others think about them.
 
  #8  
Old 03-10-2019, 01:03 PM
Overkill2's Avatar
Overkill2
Overkill2 is online now
Elder User
Join Date: Mar 2017
Location: Western NY
Posts: 579
Overkill2 is gaining momentum as a positive member of FTE.
Originally Posted by just another truck View Post
Love the quote, "being cool aint cheap".

So, I guess thats a great question, what am I looking for, honestly, probably an excuse to start moding the truck, as far as cool, to old for that.. now it is just about having fun..
Thanks, I got that from a buddy of mine after I bought my 350. While I love the look of a lifted truck and bigger tires, it usually has a negative effect on mileage. If I do anything, I'll level the front. I have plans on getting a snowplow so I don't really want to plow with a lifted truck. You're creating more wind drag by being lifted and those aggressive tires also create more drag as they weigh heavier and don't have a smooth pattern. I get the fun part. I'd love to get an older 6.0 down the line and mod it a little. But my 16 is still under warranty and is the family vehicle. You probably didn't regear after adding the bigger tires because they are 6 inches taller than the stock 275/65R20s. The 6.7 has the torque to pull the truck with the bigger meats on but it still has to affect mileage. I keep track of all fillups but haven't calculated them recently. I'll post up results here at one point. But here in New York with the winter blend, I'm getting 13 to 14 mpg and summertime it goes to 15-16 easily. That's mixed driving. On a road trip to Kentucky, I got 18 mpg and that was doing 70 to 75 mph. It will vary based on wind, flat, uphill and downhill. If you want to have fun, LOWER the truck so she can handle the road better at speed, get a set of tunes with SOTF and blow the doors off the Mustangs and Covettes. Just my 2 cents.

Originally Posted by jav_eee View Post
I find the opposite to be the case with mine. My buddies too. Usually shows .5 mpg more than hand calculations.
I started keeping track of what my truck says for gallons used and MPG. It usually is at least 1 gallon more and 1 mpg more -- the truck that is than my calculated results.
 
  #9  
Old 03-10-2019, 01:04 PM
Overkill2's Avatar
Overkill2
Overkill2 is online now
Elder User
Join Date: Mar 2017
Location: Western NY
Posts: 579
Overkill2 is gaining momentum as a positive member of FTE.
Originally Posted by Chuck-B View Post
The huge factors are driving the speed limit (which this old man canít) and towing. My Ď13 gets 13.9 mpg but I canít keep it under 80. Just who I am. I had it up to 14.9 but something happens in my brain when Iím in the right or center lane and someone Ďgets aheadí of me. You donít wanna be with me when Iím in a traffic jam - lmao. The nice thing about being in your 60s is that you know most of your faults and could care less what others think about them.
Chuck, you crazy old man you!
 
  #10  
Old 03-10-2019, 10:14 PM
UP_There's Avatar
UP_There
UP_There is offline
Post Fiend
Join Date: May 2007
Location: Flagstaff, Arizona
Posts: 5,350
UP_There has much to be proud ofUP_There has much to be proud ofUP_There has much to be proud ofUP_There has much to be proud ofUP_There has much to be proud ofUP_There has much to be proud ofUP_There has much to be proud ofUP_There has much to be proud ofUP_There has much to be proud ofUP_There has much to be proud of
If you've got the itch already to mod it, and also improve mileage and power...….delete it. No looking back. I'm running 37's with 6" lift, and I get 15mpg in town, just a shade under 19 mpg highway. Towing, I believe about 13, haven't paid attention as much, but it's way better then my modded 7.3 was, with wayyyyyyy more power. Welcome to the 6.7
 
  #11  
Old 03-11-2019, 08:47 AM
Overkill2's Avatar
Overkill2
Overkill2 is online now
Elder User
Join Date: Mar 2017
Location: Western NY
Posts: 579
Overkill2 is gaining momentum as a positive member of FTE.
Originally Posted by UP_There View Post
If you've got the itch already to mod it, and also improve mileage and power...Ö.delete it. No looking back. I'm running 37's with 6" lift, and I get 15mpg in town, just a shade under 19 mpg highway. Towing, I believe about 13, haven't paid attention as much, but it's way better then my modded 7.3 was, with wayyyyyyy more power. Welcome to the 6.7
Hey dude, how fast is your highway speed normally and what gears does your rig have?
 
  #12  
Old 03-11-2019, 11:46 AM
UP_There's Avatar
UP_There
UP_There is offline
Post Fiend
Join Date: May 2007
Location: Flagstaff, Arizona
Posts: 5,350
UP_There has much to be proud ofUP_There has much to be proud ofUP_There has much to be proud ofUP_There has much to be proud ofUP_There has much to be proud ofUP_There has much to be proud ofUP_There has much to be proud ofUP_There has much to be proud ofUP_There has much to be proud ofUP_There has much to be proud of
Originally Posted by Overkill2 View Post
Hey dude, how fast is your highway speed normally and what gears does your rig have?
75 mph on highway for most of it, but 65-68 mph on another highway I frequent. I have 3:55 gears, and run max pressure in tires in front always, max on rears only when towing. In town I drive like a grandpa to get the 15. I have tested a few tanks, and if I drive aggressively I have gotten around 13.5. My city is pretty small, so there's no rush haha. Also, I live at 7100 ft elevation, so the lack of oxygen affects power and mileage a bit.

*EDIT* My speedo is adjusted for 35's so it's fairly close on the 37's. All my calculations are hand done, on mileage. I have put it up against the computers numbers, and it's very close...
 
  #13  
Old 03-11-2019, 02:07 PM
just another truck's Avatar
just another truck
just another truck is offline
Post Fiend
Thread Starter
Join Date: Feb 2007
Location: Sterling Heights,Mi
Posts: 10,428
just another truck has a superb reputationjust another truck has a superb reputationjust another truck has a superb reputationjust another truck has a superb reputationjust another truck has a superb reputationjust another truck has a superb reputationjust another truck has a superb reputationjust another truck has a superb reputationjust another truck has a superb reputationjust another truck has a superb reputationjust another truck has a superb reputation
Originally Posted by Overkill2 View Post
Thanks, I got that from a buddy of mine after I bought my 350. While I love the look of a lifted truck and bigger tires, it usually has a negative effect on mileage. If I do anything, I'll level the front. I have plans on getting a snowplow so I don't really want to plow with a lifted truck. You're creating more wind drag by being lifted and those aggressive tires also create more drag as they weigh heavier and don't have a smooth pattern. I get the fun part. I'd love to get an older 6.0 down the line and mod it a little. But my 16 is still under warranty and is the family vehicle. You probably didn't regear after adding the bigger tires because they are 6 inches taller than the stock 275/65R20s. The 6.7 has the torque to pull the truck with the bigger meats on but it still has to affect mileage. I keep track of all fillups but haven't calculated them recently. I'll post up results here at one point. But here in New York with the winter blend, I'm getting 13 to 14 mpg and summertime it goes to 15-16 easily. That's mixed driving. On a road trip to Kentucky, I got 18 mpg and that was doing 70 to 75 mph. It will vary based on wind, flat, uphill and downhill. If you want to have fun, LOWER the truck so she can handle the road better at speed, get a set of tunes with SOTF and blow the doors off the Mustangs and Covettes. Just my 2 cents.



I started keeping track of what my truck says for gallons used and MPG. It usually is at least 1 gallon more and 1 mpg more -- the truck that is than my calculated results.
amazingly, the tires are barely larger then stock, in at 325, 60,20. So not much larger.
 
  #14  
Old 03-11-2019, 07:04 PM
Overkill2's Avatar
Overkill2
Overkill2 is online now
Elder User
Join Date: Mar 2017
Location: Western NY
Posts: 579
Overkill2 is gaining momentum as a positive member of FTE.
Originally Posted by just another truck View Post
amazingly, the tires are barely larger then stock, in at 325, 60,20. So not much larger.
Originally Posted by just another truck View Post
A little history First, I had the almighty 7.3 for over 300,000. And with the help of the FTE world, I had a BTS trans, a Garret 38r turbo, split shot injectors, I had DP tunes, the Kwick 6637 airfilter and a 4" exhaust turbo back, modified High Pressure Oil Pump ( done before the injectors) . All in the quest of better Mileage. What I got was a Bad azz 1999 F 250 that served me well for 19 years, and the only gain I ever saw was a .5 mpg better after intake and exhaust.

I now own a 2011 F350 4x4 CC SB sitting with a 4" lift, 325x80x20 BFG AT stock. City appears to be around 14 and highway 15.7 ( based on Lie O Meter).. What kind of trouble can I get into here??
Okay but you had 325/80R20 listed. I stand corrected. With the 325/60s, you're just over 35".
 
  #15  
Old 03-13-2019, 12:15 PM
just another truck's Avatar
just another truck
just another truck is offline
Post Fiend
Thread Starter
Join Date: Feb 2007
Location: Sterling Heights,Mi
Posts: 10,428
just another truck has a superb reputationjust another truck has a superb reputationjust another truck has a superb reputationjust another truck has a superb reputationjust another truck has a superb reputationjust another truck has a superb reputationjust another truck has a superb reputationjust another truck has a superb reputationjust another truck has a superb reputationjust another truck has a superb reputationjust another truck has a superb reputation
Originally Posted by Overkill2 View Post
Okay but you had 325/80R20 listed. I stand corrected. With the 325/60s, you're just over 35".
I know, Bumped out the wrong info,
 
 


Thread Tools
Search this Thread

Contact Us - About Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: