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Old 06-13-2015, 05:32 PM   #1
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Fuel Mileage with Generator Running

I'm curious what others are experiencing for fuel mileage when running the generator for the front AC while traveling? Is it even noticable?

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Old 06-13-2015, 07:09 PM   #2
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Depending on your Gen set, and load, you may not see anything. Ours is a 4000 and under full load it will consume 0.8gph, which is nearly a MPG if traveling at a constant 60ish MPH.
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Old 06-13-2015, 07:32 PM   #3
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Thanks CarlB.... We'll have the 5500 gen so I would guess not much differance.
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Old 06-13-2015, 07:41 PM   #4
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And you definitely will not be at full load, probably more like 1/2 load or less 90% of the time while driving.
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Old 06-23-2015, 12:56 PM   #5
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Steve, last week we travelled 2 days running the front AC off of generator which also powered the fridge. I don't really keep track of fuel mileage but I didn't see any significant drop in fuel consumption.
With the sun to our backs, I reduced the AC output from the dash a few times and we also used a 12'' box fan to move the air at floor level. We were very comfortable, Mary and I and 7, 14 & 18 year old grandkids.
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Old 06-26-2015, 10:35 PM   #6
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Used both AC's heading from OKC to NOLA in 90's temps. Drove 75ish and averaged about 6.7mpg with the gen running the entire time. YMMV.
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Old 06-26-2015, 10:36 PM   #7
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Sorry. 2015 Precept 29UM with 5500 gen.
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Old 06-27-2015, 07:46 AM   #8
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There is some discussion about MPG on the Gone with the Wynn's blog after a recent post on the subject. I read through 5 pages of comments and 6 to 8 MPG is the norm from the input of everyone there. Specifically for the V10 platform.

The diesels get a few MPG more, with the sprinter based rigs being the MPG champs averaging around 15mpg.
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Old 06-30-2015, 10:04 AM   #9
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Well, I finally checked my fuel mileage travelling with the genny, front AC and fridge on...............6.8mpg. That is only on 1 tank so may not be totally conclusive. I was on interstate for about 1/5th of the drive and the rest was in the Boston Mountains, 2 lane in AR.
That is about the same mileage I got with my 350, dually, crew, V10 pulling a 37' toyhauler.
I will add that my driving habits are using the cruise set at 60-62 and let the tranny and engine do the work.
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Old 06-30-2015, 01:28 PM   #10
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IMO, the range will be roughly 6.5-8.0 with the variable being your right foot and the terrain.

One trick I use is to release the cruise control when approaching an overpass and not re-engaging until back on relatively flat road. I use the "RES" button to release & re-engage the CC.

Like D&MAKAFUN, I'm set in the low 60s and I've got an overall average of about 7.5 (with and w/o gen).
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Old 07-02-2015, 10:35 AM   #11
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Quote:
Originally Posted by McGarrett50 View Post
IMO, the range will be roughly 6.5-8.0 with the variable being your right foot and the terrain.

One trick I use is to release the cruise control when approaching an overpass and not re-engaging until back on relatively flat road. I use the "RES" button to release & re-engage the CC.

Like D&MAKAFUN, I'm set in the low 60s and I've got an overall average of about 7.5 (with and w/o gen).
McGarrett50, You made a good point with your "trick". I had become lazy and just let the CC work with the computer to keep me at speed. Yesterday on our way to Lincoln NE, I used your method, maintained my speed within 4-5 mph of my cruising speed and never once had the tranny shift so low that the "roar" came in. Thanks
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Old 07-02-2015, 06:28 PM   #12
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on the 5500 Generator, it will burn 0.9Gph under full load. https://powersuite.cummins.com/PS5/P...ets/a-1425.pdf
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