MPG's
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Senior User
Joined: Sep 2006
Posts: 185
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MPG's
My mpg's have really dropped off lately. It is getting to be the time of year I head north alot. I went up Friday night and back home Saturday this week so I really watched my numbers. First off I use my cruise religiously. I set it where my speedo reads 72-74. According to my LCD thingamabob which is what I have always gone by. Im in the 15-17 mpg range. I was always in the 18-20 range before. The way I have checked it is when I get on the highway I reset it. I figured this is the best way to get highway mpg's with no city driving.
Sorry its so long I wanted to give the most detail I could.
Anyone else find this?
Oh ya Im at 21000 miles.
Tim
Sorry its so long I wanted to give the most detail I could.
Anyone else find this?
Oh ya Im at 21000 miles.
Tim
Lead Driver
Joined: Jan 2010
Posts: 6,600
Likes: 84
Fuel filters.
6.7L Normal duty
Change every 3rd oil change or every 22,500 miles
(36,000 km) or as indicated by the message center
which ever comes first
6.7L Special (severe) duty
Change every 15,000 miles (24,000 km) or 600 engine
hours or as indicated by the message center which ever
comes first
6.7L Normal duty
Change every 3rd oil change or every 22,500 miles
(36,000 km) or as indicated by the message center
which ever comes first
6.7L Special (severe) duty
Change every 15,000 miles (24,000 km) or 600 engine
hours or as indicated by the message center which ever
comes first
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Posting Guru
Joined: Oct 2010
Posts: 1,777
Likes: 0
I would definitely do the filters. I'm still running winter blend and see 18.5 give or take a few tenths at 55. On summer blend I am 1 to 1.5 mpg higher at the same speed. All at empty weight except for my fat ****.
Mostly city driving (more suburban) I am at 14.8 on winter and again about 1 - 1.5 higher on summer.
Specifics: 20inch wheels with stock tires, Short wheel base, 4X4, stock fuel tank, 3.55 with ELD, dual alternators, running PS cetane boost and a middle age driving style (Not in a hurry but will blow the wheels off of anything looking to race me).
Mostly city driving (more suburban) I am at 14.8 on winter and again about 1 - 1.5 higher on summer.
Specifics: 20inch wheels with stock tires, Short wheel base, 4X4, stock fuel tank, 3.55 with ELD, dual alternators, running PS cetane boost and a middle age driving style (Not in a hurry but will blow the wheels off of anything looking to race me).
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Senior User
Joined: Nov 2010
Posts: 376
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From: Tempe, AZ
As opposed to a senior driving style (Not in a hurry, and with a left or right turn signal flashing continuously).
Joe, somewhere between the two.
Elder User
Joined: Mar 2011
Posts: 824
Likes: 0
From: Maryville (Mur Vul), TN
Filled my truck today and reset trip odometer and it now says I am gettirng 20.3 MPG a lot different than 15.6... Hope it keeps the 20+ MPG. It did say I needed 19.5 gallons of fuel when I only put in 17.8. All bets are off on the first tank.
Freshman User
Joined: Dec 2010
Posts: 29
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The Lie o meter is off at least 1 to 2 mpg.. I hand caculate
the best i get 30 miles each way to work driving 65 to 70
tops is 17.25.. F350 s/c 8ft bed 355's 20"s.. I don't know where
you guy's get 20 plus mpg.. Must be very flat 50mph..
the best i get 30 miles each way to work driving 65 to 70
tops is 17.25.. F350 s/c 8ft bed 355's 20"s.. I don't know where
you guy's get 20 plus mpg.. Must be very flat 50mph..
Elder User
Joined: Mar 2011
Posts: 824
Likes: 0
From: Maryville (Mur Vul), TN
I am telling what I see. We all know that we will not be keeping 20 MPG all the time. It is not a LIE just an observation at any one time. Some people have 3.31 and short boxes and maybe will get a couple of MPG better than you. I do try drive somewhat conservative and only drive 5 over. At $4+ per gallon I have to change my driving habits. I have a spreadsheet and put all the info in to keep track of my mileage. Started this with my Jetta and the best ever was 41.6 mpg and the worst was 35.3 mpg but the average is 38.5 mpg. I have set up the same spreadsheet for my new truck. My first fill was yesterday and I reset the trip odometer and the 15 mile trip home it said I was getting 20.3 mpg, just an observation.
Posting Guru
Joined: Apr 2004
Posts: 1,399
Likes: 1
From: Corinth, TX
I've always thought it funny that so many people completely trust the odometer in their "hand calculations", but the MPG meter is called a lie-o-meter. They trust the fuel station's gallon measurements in their "hand calculations", but not the same meter on their trucks.
FWIW, my truck's odometer is pretty far off. In an indicated 10 miles traveled, I've usually gone 11.3, according to the mile markers on the highway. That's a 13% difference! I no longer worry about hand calculations, LOMs, etc. Each method is an estimation based on potentially flawed data. At least I can see changes in my own mileage if I use the same tool each time... and the LOM is the easiest method. To each his own, I guess.
FWIW, my truck's odometer is pretty far off. In an indicated 10 miles traveled, I've usually gone 11.3, according to the mile markers on the highway. That's a 13% difference! I no longer worry about hand calculations, LOMs, etc. Each method is an estimation based on potentially flawed data. At least I can see changes in my own mileage if I use the same tool each time... and the LOM is the easiest method. To each his own, I guess.
More Turbo
Joined: Jun 2003
Posts: 610
Likes: 3
I noticed my mpg went back up a little. From 10.8ish up to 11.3, which is where it used to be. I'm thinking we must be out of the winter fuel here in Oregon. I trust the meter up top overall. I figure its probably more accurate then all the differences you can come up with seeming how there isn't an exact line you can fuel your tank with. Each pump and each fill up will top off differently.
Senior User
Joined: Nov 2010
Posts: 202
Likes: 0
From: Minneapolis, MN
I was getting 15.3 avg. W/ winter blend. After my first oil change and summer fuel hitting the stations I am getting 16.
All that said I don't really care and drive it like it was stolen most the time
All that said I don't really care and drive it like it was stolen most the time
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