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Old 01-11-2015, 11:10 AM   #21
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I use a different formula when going out... I use TPT (Trips per tank). We average trip to campsite, 3 trips to the swim beach, 1 trip to the store (cuz we ran out of beer).. 2 trips to the dump station towing our gray water tote) and 1 trip back home... I average 3/4 tank per trip... :-)
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Old 01-11-2015, 11:27 AM   #22
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It all depends on who is driving...snip...
My 1969 Olds 442/W30 got 5 mpg (max) going down hill and a strong wind pushing me. ... snip ...

Don
When I put in larger injectors, I expected my mileage to drop. It didn't. Probably because I was, and still am, easy on the throttle. When you think about it, it takes a given amount of energy to move down the road. My new injectors have the capability to supply more fuel and faster than before, but at less than full throttle my throttle position was supplying the same amount of fuel (energy) as before. Only the throttle position was different.

BUT, my factory, on-board computer said my fuel mileage had increased - a lot - with the larger injectors! From ~20mpg to ~27mpg. I was on cloud nine, until I fueled up. No mpg change! Then it dawned on me that the computer wasn't measuring actual fuel used, but how much fuel the computer thought (hmmm.. maybe computed is a better word) was being used based on the fuel stock injectors supplied at various throttle positions.

(BTW, my 1969 Camaro Z28 got .... sorry... I can't recall what the mpg was. Didn't care. )
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Old 01-11-2015, 05:40 PM   #23
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06 Ford escape v6 light I get 30mpg hwy. With my 3000# camper I get 12mpg. With my beat up suburban with a v8 I get 18 mpg hwy light. With the same camper I get 9mpg. But it can carry a lot more stuff and weight than the escape.
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Old 01-11-2015, 05:48 PM   #24
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2011 duramax - 18-19 unloaded @ 60-65mph & 11-12 loaded.

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Old 01-11-2015, 05:57 PM   #25
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Last winter I towed a FW that weighed 11K from WA to AZ. I averaged 11.5 mpg for 2500 miles round trip at 65 MPH. I average about 14 in town and 19 on the highway empty. I drive at least the posted limits. I don't have any stats on our new 361REQS but I will expect to lose a little.
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Old 01-11-2015, 06:09 PM   #26
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Can I play Devils advocate for a minute? I see a lot of posts here re. MPG. unless I were doing a cross country trip and needed to know how far I could travel between trips to get to the next station I couldnt care less about what my mileage is. I have always figured an RV was like a boat, if you have to worry about the fuel then you shouldn't buy one.

Please understand, I mean no malice at all to anyone, I just was curious about why so much interest.
I have always watched my MPG and use it as a indication in the way the vehicle is running. Should it start to decrease I start to look for a reason. My Dad taught me that many years ago.
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Old 01-13-2015, 12:28 AM   #27
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Pulling our Jayco 330RLTS travel trailer we get 10 to 13 mpg. Pulling our small 22ft travel trailer we get 12 to 14 mpg. Empty truck is usually around 18. Speed and wind are really big factors.
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Old 01-13-2015, 08:00 AM   #28
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9 empty and 7.5 towing
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Old 01-14-2015, 10:54 AM   #29
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9 empty and 7.5 towing
big block 496 Avalanche
Not many of those made? Sounds like fun...

The Tahoe gets about 14mpg empty, 6-8 towing. My last TV (an 02 Yukon) had a smaller engine (The 4.8L) and got about 1mpg better than the Tahoe. All that being said, the Tahoe didn't pull our 242 as nice as the Yukon. Not sure if the Tahoe has steeper gears, but just doesn't seem to tow as nice
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Old 01-14-2015, 11:20 AM   #30
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13 empty mixed city/hwy, 8-9 towing
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