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05-23-2015, 03:41 PM
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#29
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Senior Member
Join Date: Sep 2014
Posts: 128
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It seems that in the CAT valve adjustment threads , it is alleged that mileage ever so slightly increases. How many of these CAT engines has had their valve adjustment done?
My 20006 Disco, has only reports 6.6 MPG @ 28000 miles. No valve adjustment yet although we are planning for one soon.
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2006 Fleetwood Discovery 39S
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05-26-2015, 01:21 PM
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#30
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Senior Member
National RV Owners Club Freightliner Owners Club
Join Date: Oct 2002
Location: silverdale wa.
Posts: 1,163
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I get between 6.5 and 7.5 overall on trips around home, such as to the upper Olympic Peninsula, eastern Wa and down to Oregon and all of them have some significant hills. I had the computer downloaded right after I got my rig in 2010 when I took it in to check for flashes and they gave me a complete loadout. It is amazing what all is on that printout for the TOTAl life of your chasis and engine. It showed the fuel mileage with both on the road mileage, 7.6, and total mileage which was all the time the engine was running,idling and driving, 7.2. I just had it done again and we found that the mileage had dropped almost .5 mpg overall. The reason that I had it done was that I have noticed a bit of power loss and some blowbye that I didn't have before. Two shops that I trust told me to run a couple of tanks with Lucas oil additive and then we'd see about doing an oil change a 5k miles and an oil test. Got a couple of 150 mile r/ts on it and a couple of trips to Portland coming up and those are about 300 r/t and then see how it's doing.
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Bigdog
2001 National Tradewinds 7390 LTC
2002 Subaru Legacy outback Limited stick
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05-26-2015, 01:31 PM
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#31
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Senior Member
Entegra Owners Club Spartan Chassis
Join Date: Mar 2011
Location: Dallas, TX
Posts: 550
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Had a 1998 Dutch Star 38' with a 330 Cat and Freightliner. Didn't know how bad the fuel economy was until I traded it on a new 2003 HR Imperial 40' with a ISL 400 Cummins. I never got more than 7 with the Cat and on a number of trips in flat areas like going to Wakarusa or Florida got 9.5 MPG and regularly got 7.5 to 8MPG with the Imperial. The imperial probably weighed nearly 5,000 more. Traded the Imperial off on a new 2011 HR Endeavor 43 with an ISL 45 and it gets better economy than the 330 cat and it weighs probably close to 5,000 lbs more than the Imperial. Maybe that is part of the reason Cat got out of the RV engine business???
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F78957
2015 Entegra Cornerstone 45B - Cayenne
2020 F150 Raptor SVT "Lead Foot"
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05-27-2015, 09:27 PM
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#32
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Senior Member
Newmar Owners Club Freightliner Owners Club
Join Date: May 2012
Location: Today? Clayton, North Carolina
Posts: 5,093
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Fuel mileage with 330 Cat
My DSDP (3126) runs at max gross all the time, 31000 Lbs. Also, when moving, it's towing the towed, right at 4000 Lbs. So we're down the road at 35000 Lbs, which is 106 Lbs/hp. For over 20000 miles cruising at 1700 rpm my average has been 7.5 mpg.
Fulltiming since '12
2002 DSDP 40, FL, Cat 3126
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John and Diane (RIP Lincoln, 21 FEB 22) RVM103 NHSO
Fulltimers since June, 2012
2002 Dutch Star 40, Freightliner, Cat 3126, 2004 Element
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05-28-2015, 06:01 AM
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#33
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Senior Member
Newmar Owners Club Freightliner Owners Club
Join Date: Aug 2012
Location: Florida
Posts: 203
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I put about 45,000 miles on my Dutch Star with a 330 Cat. Ran it at about 57mph. Got about 7.5 mpg.
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05-28-2015, 09:39 PM
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#34
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Senior Member
Freightliner Owners Club
Join Date: Apr 2004
Location: Show Low Az
Posts: 1,321
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Me, my belief is simple. If you worry about mileage. Then you should not own a Diesel Pusher. Stick to the Class "B" size.
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Dale&Susan, 08 Alfa Gold, DaGirlsRv Blog
2015 F-150XLT_2000W Solar_800 AmpHr Lithium
Magnum_MSH 3012 & PT100
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05-29-2015, 09:59 AM
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#35
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Senior Member
Entegra Owners Club Spartan Chassis
Join Date: Mar 2011
Location: Dallas, TX
Posts: 550
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Mileage and weather
Don't know how long you have owned a MH but I have since 1972. What I have found over many years is that RVers talk about fuel economy the way farmers talk about weather. It is just something to talk about but no one can do anything about. If one wants economical transportation, they should consider an electric car, not a motorhome!
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05-30-2015, 10:37 AM
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#36
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Senior Member
National RV Owners Club Freightliner Owners Club
Join Date: Oct 2002
Location: silverdale wa.
Posts: 1,163
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Quote:
Originally Posted by TurboDaveTX
Don't know how long you have owned a MH but I have since 1972. What I have found over many years is that RVers talk about fuel economy the way farmers talk about weather. It is just something to talk about but no one can do anything about. If one wants economical transportation, they should consider an electric car, not a motorhome!
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X2.
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Bigdog
2001 National Tradewinds 7390 LTC
2002 Subaru Legacy outback Limited stick
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05-30-2015, 08:24 PM
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#37
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Senior Member
Winnebago Owners Club
Join Date: Jan 2014
Location: North Central Alberta
Posts: 193
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I just did a 6280 mile trip from Alberta to Arizona and back and got 7.9 mpg. with our 2004 Journey with a 330 Cat.
Towing a 2004 Grand Cherokee and mostly travelling 65 mph.
__________________
2004 Winnebago Journey 36G 330Cat
2004 Grand Cherokee BlueOx towbar
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06-07-2015, 09:41 AM
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#38
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Senior Member
Join Date: May 2013
Posts: 248
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yes ihave a 2005 39l with a cat 330 and the very most I got was 8 mph on us gallon with no vechicle that's all you'll get and I travel approx. 65 mph
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06-07-2015, 04:03 PM
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#39
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Senior Member
Join Date: Jul 2000
Posts: 4,027
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Comparing any post 02 MH with a pre 02 is not fair. Doesn't matter if it is Cat or Cummins. The pollution junk on any post 02 engine cuts into the MPG.We had an 02 Bounder with the ISB. Best I ever got was 9.5 driving under 65 MPH. Our 05 Bounder with the C7 got 8 to just over 8. Anyone claiming over 13 mpg either needs a new calculator or is a fisherman.
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Moisheh
2008 Dynasty 42' Diamond IV
1988 Bluebird PT38
2009 Silverado Toad
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06-24-2015, 06:27 PM
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#40
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Senior Member
Join Date: Oct 2014
Location: Port Orchard, WA
Posts: 4,215
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Missing some information
Quote:
Originally Posted by Chinewalker
I just did a 6280 mile trip from Alberta to Arizona and back and got 7.9 mpg. with our 2004 Journey with a 330 Cat.
Towing a 2004 Grand Cherokee and mostly travelling 65 mph.
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Chinewalker, Just curious about your post and a bunch of others in this thread. Except for those who actually pulled the mileage out of the computer, is anyone running a generator either under way, or boondocking? Since it comes from the same tank, baring using a computer system, just figuring mileage off of the odometer divided by gallons purchased could get mighty misleading. Just my $1.89 worth (2 cents adjusted for inflation)
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Scot & Laura Kellersberger, U.S. Army (ret)
Newmar 4 wheel drive Dutch Star 3891, SOLD
Now RV'ing on the water in a Trawler!
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06-24-2015, 07:14 PM
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#41
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Senior Member
Join Date: Nov 2009
Location: Bainbridge Island, Wa
Posts: 557
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Quote:
Originally Posted by Hit_the_Rhod
Chinewalker, Just curious about your post and a bunch of others in this thread. Except for those who actually pulled the mileage out of the computer, is anyone running a generator either under way, or boondocking? Since it comes from the same tank, baring using a computer system, just figuring mileage off of the odometer divided by gallons purchased could get mighty misleading. Just my $1.89 worth (2 cents adjusted for inflation)
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I believe that 7.9 mpg is highly suspect towing a 4000 lb toad. To further comment, when using the genset, your mileage would decrease depending on how long you run the genset.
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2004 Newmar Kountry Star Diesel Pusher, Chevy Tracker, Kizzy, Desi,Rosie, Red Ryder and Trek our Vizsla's
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06-24-2015, 07:15 PM
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#42
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Senior Member
Join Date: Jun 2012
Location: The Bluegrass State
Posts: 8,886
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Our results are about the same as Chinewalker's results (we get about 7.6) and that takes into account 4 hours of generator running per day dry camping. I take the MPG results directly off the engine computer.
Now that being said, I don't know if the engine computer uses the generator fuel in its calculations or not. It may just use a fuel meter on the engine itself and doesn care about other fuel uses.
BTW we have a Honda CRV following us everywhere.
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Good Luck, Be Safe and Above All, Don't Forget To Have Fun
Pete
Central Kentucky
2006 Fleetwood Discovery 35H, 2014 Honda CR-V, M&G Engineering Braking System
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