Bad MPG's
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Senior User
Joined: Nov 2007
Posts: 490
Likes: 0
Bad MPG's
I have been getting 10 to 12 miles per gallon for the last couple months, doesn't seem to matter how I drive it. This summer I was getting about 18. So I was wondering if the winterized fuel is giving the terrible mileage or if my fuel system is to blame(IP, injectors). I have noticed some loss in performance, now running down the highway it will pull up to 4lbs of boost on a straight and it never used to. Only going up hill. I also turned fuel up two flats and increased the timing a hair with no change in mileage. I want my mpg's back diesel goes through the roof in price.
Fleet Owner
Joined: Jul 2006
Posts: 20,347
Likes: 803
From: Mi'kma'ki
winter fuel is a major hit!
bad thing is,it's not reduced in price!
i dropped my max speed to 40mph,just enough to stay comfortably in OD.
it's the only thing that has made it bearable.
when plowing,forget it though.im just talking my normal operations.
.........your not alone.
im doing a job right now i can walk too! im loving it lol!
good sized job too.oh thank the maker!
on the other side of the coin,i just had to replace a $450 starter in my diesel chipper.
lol.it's always something boys.
bad thing is,it's not reduced in price!
i dropped my max speed to 40mph,just enough to stay comfortably in OD.
it's the only thing that has made it bearable.
when plowing,forget it though.im just talking my normal operations.
.........your not alone.
im doing a job right now i can walk too! im loving it lol!
good sized job too.oh thank the maker!
on the other side of the coin,i just had to replace a $450 starter in my diesel chipper.
lol.it's always something boys.
Senior User
Joined: Aug 2010
Posts: 239
Likes: 0
From: Agawam MA
Hmmm I noticed a drop in my mileage here also, last tank that I got 17mpg on was filled Nov 11, since then every tank I have gotten between 13-15..
What is the difference in Winter fuel that makes it 10-15% less efficient?
What is the difference in Winter fuel that makes it 10-15% less efficient?
i ain't rite
Joined: Mar 2005
Posts: 65,450
Likes: 5,520
From: Marlboro Mental Hospital.
i took a 5 mpg hit in the 02 powerstroke since they started overcharging us for that "winterized" crap.
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Logistics Pro
Joined: Sep 2007
Posts: 3,737
Likes: 179
From: Western Mass
There are likely other additives in the picture as well.
Related info: The owners manuals for VW MK1 Diesels (original Rabbit, Jetta and Pickup) tells owners that diesel can be blended with kerosene or gasoline to increase the fluidity of the fuel during the winter. Engine output is decreased, and the blend should be no more than 20-30% to prevent damage. This is from a 1980 manual. The 1.6L IDI is similar in many regards to our 7.3L in terms of simplicity and operation. Just much smaller...
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