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Old 01-19-2016, 10:30 PM   #85
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I have tracked every single fill on my 15 RAM dually. I fill to the top, almost every tank the EVIC reads .4 high. Example hand calc 8.6 the EVIC will read 9.0.

So far West coast no wind mileage average is 9.0 combined weight 32,500#. I tow at 60.
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Old 01-21-2016, 12:45 PM   #86
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I have tracked every single fill on my 15 RAM dually. I fill to the top, almost every tank the EVIC reads .4 high. Example hand calc 8.6 the EVIC will read 9.0.

So far West coast no wind mileage average is 9.0 combined weight 32,500#. I tow at 60.

Good to know, thanks for sharing. How many miles are you up to on your rig now?
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Old 01-23-2016, 12:59 PM   #87
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I am knocking on the door of 12K. Just returned from a trip we spent a week along the Colorado River near HWY 10 and a couple days dry camping at Quartzite and are now back in the PalmSprings area. Hand calc 8.7mpg. Was carrying extra water and waste but I doubt that made much difference. It really still amazes my how quiet the ride is when traveling at 60 in 6th on flat ground with the engine turning 1,750RPM's. Coming down the grade into the Coachella Valley it must be 6% I had the cruise set at 60 and trans locked in 4th it kept right at 60 except for the steepest parts it creeped up to 62-63. If it had gone any higher I would just touch the brakes and re set the cruise at 60. This has worked well on the steep mountain passes along I-5 border to border.

I know I elaborated a bit on your question!
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Old 02-23-2016, 07:55 AM   #88
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Trip South I-71 to I 65 to Mobile, AL 9.55 - 11.3 mpg range on 4 tanks hand calculated...speed around 65 MPH. Trip North I 95, I 26, I 77 to Cleveland, OH 9.7 MPG on first tank, flat terrain 68 to 70 MPH? next two tanks 11.4, 11.95 MPG speed around 68 - 70 MPH. I do not understand why the first tank is 15+% less? Next day 10.44 MPG and 11.0 MPG...and this was on real hilly parts of I 77 thru Virgina and West Virgina and this was with my BullyDog tuner set in the "Tow" mode. BTW...trunk MPG meter was alway very optomistic.

My overview of my first RV trip. I think the 10.5 to 11.0 MPG at 65 to 70 MPH speed is pretty good? The 9.5 MPG, not sure what to make of this because my driving style was the same...could it be the diesel fuel having less energy/gallon? Now about the BullyDog tuner...used it for the first 75% of the way down. It was to aggressive with the cruise control and up hill slow down, it down shifted two gears...ie close to 3,000 RPM's, then 3-5 second would shift up one gear 2500 RPM. If I would release cruise on up hill...it wouldn't downshift. But I turned it off, could use cruise control for the balance of the way down. Trip home...did not use "Tow" mode it until got to "Fancy Gap" on I 77 and only use "Tow" mode once moving at speed. Lots more power to pull up the steep hills in 3rd gear (O/D not engauged). Did see the coolant temperature get to 210* at the top of a couple of the long up hill pulls, but cooled right back to normal of 197* after the crest. I wonder what the trans and turbo exhaust temps were reading? Cause the 5.9 Cummins was working pretty hard! To me, the truck/5ver combo going at 70 MPH was comfortable, but I tried to keep a 10 car distance between me and what is up front...sometimes very hard to do when some azzhole passes you then cuts in front of you like he want to slam the door in your face. A good trip...now back in the cold Cleveland area.
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Old 02-23-2016, 09:38 AM   #89
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Good roads, good weather, 60 mph. High winds, bad roads, etc. only as fast as I feel safe.

Typically below 50 mph, I abandon the Interstate.

I gave up the macho approach about the time the pimples went away, yet it does no bother me to see some yahoo screaming down the road. It is money and his life and it is a free country.
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Old 02-23-2016, 09:46 AM   #90
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Try to stay around 60 - 65 when everything is good.
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Old 03-02-2016, 12:31 PM   #91
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Most trailer tires are speed rated for 65.
I usually tow mine at 65-68 that's it
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Old 03-02-2016, 12:45 PM   #92
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If the rating is 65, that should be considered a hard maximum limit to prevent damage.

Lot's of good info here: RV Tire Safety: Speed Rating
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Old 03-02-2016, 01:13 PM   #93
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Old 03-02-2016, 06:19 PM   #94
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Most trailer tires are speed rated for 65.
I usually tow mine at 65-68 that's it
The good ones are 75.
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Old 03-03-2016, 08:39 AM   #95
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L rating is good to 75 mph
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Old 03-03-2016, 09:42 AM   #96
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Most trailer tires are speed rated for 65.
I usually tow mine at 65-68 that's it
Just like the signs along the road, the speed posted is the LIMIT, meaning the MAXIMUM, not the recommended constant velocity.
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Old 03-05-2016, 08:15 AM   #97
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I have never had ST tires on my trailers for the last 16 years. LT tires are ok over to 70mph and it's my limit.
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Old 03-06-2016, 11:18 AM   #98
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Not sure why everyone wants to go so fast? The few minutes saved by taking on extra risk is a poor return in investment.
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