Re: Can we settle this diesel mileage issue

Posted by Dave Grubb on January 12, 2004 at 16:12:52 from (68.84.38.135):

In Reply to: Can we settle this diesel mileage issue posted by Red Tom on January 12, 2004 at 15:50:39:

The simple answer is that they don't get 10 mpg difference.

While there maybe one here or there that gets more or less than the norm the biggest difference is in the guy that is telling you what he gets. Some will tell you what they think they get, some what they wish they got, and once and awhile one actually knows and will tell you the truth.

I cannot tell you the specifics on your truck--but a rule of thumb is that in equal trucks doing equal service with equal power outputs the diesel will get about 25% higher mileage than will a gas engine.

I currently have a Ford 7.3 liter and have recorded every drop of fuel that I have put into it---with notes as to details about the conditions of each tank (yep---I'm anal).

I have not updated my data base since 100,000 miles--but at that point I had averaged 15.9 mpg overall.

I have gotten as high as 24.2 mpg with straight #2 running at 62 mph on the flat without wind.
I have gotten as low as 11.3 at a gross wt of 17K in the hills.

For the 100k I have run about 30% of that pulling trailers of various weights.

Winter fuel cuts me down about 10% and I have a cap that is on about 50% of the time which extends 6" above the roof of the truck---that reduces mileage 1-1.5 mpg.

Hope this helps even though it does not address your engine.

One last thought---I have 108,000 miles on mine now and will run it for at least another 150,000---and that is a big value to me---not to mention it pulls anything I ask it to :D

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• Re: Re: Can we settle this diesel mileage issue Dave Grubb 18:30:43 01/12/04 (0)

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