Posted by Ken in MN on November 27, 2007 at 16:38:42 from (64.136.49.227):
In Reply to: 2003 GMC 2500HD 8.1L posted by Matt Weltz on November 27, 2007 at 14:49:13:
I have an 03 2500HD with the 8.1, allison, ext cab shortbed 4X4. The best I can get for mileage around here in north central MN is high 10's. Last july The wife and I went to southern MO on vacation, down there I was getting around 13.8 mpg, with a best of 14.9. As we were driving home, the closer we got to home , the worse the mileage got. Still have not figured that one out. My truck will do slightly better with 89 octane versus 87. I have never used a programmer, but have heard that hypertech is not a very good one for these engines. Check out dieselplace.com, there is a section for "gassers" that has some useful info.
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Today's Featured Article - The Day Mom Drove the 8N - by Brian Browning. My Dad was wanting to put in a garden but couldn't operate the 8N and handle the old horse drawn plow he had found and rigged up to use with the tractor. Well, he decided to go get Mom out of the house and have her drive the tractor while he walked behind the plow. You got to understand that while my Mom is a hard worker who will always help whenever she can... she had never operated farm machinery before that day. Dad got her out there, explained how the clutch was the same as in our o
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