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Looking for advice before your next adventure? Look no further.25,152 PostsLatest Activity: Jul 30, 2025
JIMNLIN wrote:azdryheat wrote:
Friend claims 18 mpg while towing 35' toy hauler with 2003 Dodge Cummins Diesel with manual transmission. He says he never goes over 55 mph. Is he for real?
I have a same '03 Dodge/Cummins NV5600 305/555 HO 3.73 axle 2wd in a 2500 short bed quad cab truck.
19 mpg while towing a heavy TH ???
...could be a single best tank using the short fill method.
....... watching the fuel guage and guessing at mpgs.
A '03/'04 305/555 Cummins HO does get some of the higher mpgs. Mine has averaged 12-12.5 mpg (pencil figures) over several tanks on long trips pulling my 11000+ lb 5th wheel trailer.
rhagfo wrote:Cummins12V98 wrote:Tvov wrote:Cummins12V98 wrote:
...
I used to get 9.5 but the wife keeps adding weight!
lol, what?! I hope your wife doesn't see that...
Yea I need to quit saying that! It's not too bad seeing out of only one eye. ;)
Since we bought the MS the gross weight has gone up 2K in 3 years of full timing.
So you people on the edge weigh your load once in a while.
Sorry so far past the edge that it doesn't matter and figuring that we may add another 500# to the 5er as we move to full time. I figure as long as I am setting on stock springs and not hitting the upper overloads I am golden!
rhagfo wrote:Cummins12V98 wrote:Tvov wrote:Cummins12V98 wrote:
...
I used to get 9.5 but the wife keeps adding weight!
lol, what?! I hope your wife doesn't see that...
Yea I need to quit saying that! It's not too bad seeing out of only one eye. ;)
Since we bought the MS the gross weight has gone up 2K in 3 years of full timing.
So you people on the edge weigh your load once in a while.
Sorry so far past the edge that it doesn't matter and figuring that we may add another 500# to the 5er as we move to full time. I figure as long as I am setting on stock springs and not hitting the upper overloads I am golden!
Cummins12V98 wrote:Tvov wrote:Cummins12V98 wrote:
...
I used to get 9.5 but the wife keeps adding weight!
lol, what?! I hope your wife doesn't see that...
Yea I need to quit saying that! It's not too bad seeing out of only one eye. ;)
Since we bought the MS the gross weight has gone up 2K in 3 years of full timing.
So you people on the edge weigh your load once in a while.
Tvov wrote:Cummins12V98 wrote:
...
I used to get 9.5 but the wife keeps adding weight!
lol, what?! I hope your wife doesn't see that...
allen8106 wrote:azdryheat wrote:
Friend claims 18 mpg while towing 35' toy hauler with 2003 Dodge Cummins Diesel with manual transmission. He says he never goes over 55 mph. Is he for real?
I would be surprised if he gets 18 empty. I have a 2013 Duramax and average about 17 empty and I know that 2003 doesn't get as good a mileage as a 2013 just because of fuel mileage improvements in the last 11 years.