rpm sweet spot on class A with 365hp v10 for mpg?

[RedJeep]

I'm in the process of buying a new to me 2008 Georgetown 36' ds350. After driving it i noticed that it is a high revving engine. No problem. But very different from my diesel. I'm curious. For those of you with (i think) 2006+ v10 what is the rpm sweet spot on class A for mpg?

[chili_s_trip]

trop-a-cal wrote:
Forget about MPG's and drive with traffic staying in safe road position. The dynamics of road vertical ups and downs, negates the sweet spot due to the weight push going down and the weight drag going up grades. Sweet spots are even useless in flat terrain as traffic dictates the safest speed. Proper tire inflation to the load is more important than sweet spot RPM's. Just know enough to speed up and slow down at RV smooth and safe rates. 8 seconds behind any vehicle in front of you at 60 MPH and merge into moving traffic with signals and accelerate to traffic speed ASAP, even if it means putting the pedal to the metal. SAFETY IS MORE IMPORTANT THAN SAVING A FEW PENNIES.

What a bunch of baloney!
jack h

[JoeH]

On our prior coach we had the v-10 and after getting a scan guage, I saw that we did best at 61-62 mph.... got between 7.8 and 8.2 mpg over 100,000+ miles. It was a 37' Pace Arrow and we towed a Geo tracker .

[hanko]

Mine likes 2400 rpm which is about 65. I think the 24000 lb chasis is geared lower than the 22

[tderonne]

I have some data that shows the fuel consumption for the 6.8 2 Valve is best between about 2000 and 2500 RPM, and flat in that band. It's just wide open data though. Only data I have for part throttle is at 2000 RPM.

2000 to 2500 RPM is about 50 to 62 MPH with a 5.38 axle and 19.5" tires, about 55 to 69 MPH with the 5.38 and 22.5" tires. Pretty wide range, and it doesn't get too bad too fast outside that range.

But, as others have said, aero is the dominant factor. Slower is better. WAY better. Limped a couple hundred miles at 50 MPH once, well over 10 MPG, compared to my regular 8.0 at 60 MPH...

[Dadio24]

I am amazed to the amount of answers/opinions this question has received. I have driven my V10 MH from 62 to 70. Haven’t been about to find the sweet spot. I found I like 67 the best so to reduce stress and add to the enjoyment of the trip. I have never been about to achieve 7-8 mpg. I normally get about 6 mpg on average going to and from Colorado. I look forward to more on this!

[TragedyTrousers]

Not much difference I found in speed vs mpg on my V10. Towing and not towing didn't make much difference in mpg either. 63mph seems to be where its happiest. 7.5 to 7.75mpg.

[fla-gypsy]

Dependant entirely on rear gear, wheel size and transmission ratios.

[jplante4]

The numbers being offered are centering around 62 MPH, but fuel economy has more to do with aerodynamics of pushing an 8 X 11 foot piece of plywood through the air than it does with mechanics. You want the lowest speed in the highest gear. That speed would be just before the transmission comes out of overdrive or downshifts.

[Dale_Traveling]

Another 62 MPH driver. Set the cruise, sit back and watch the world go by. If you really want to have fun find the speed limiter (around 75 MPH) and watch the gas gauge move.

[Heisenberg]

62mph

[jolooote]

2006 34' Class'A' liked 67 mph.

[happy-2]

I to have a 2006 37c with a v-10,i find that if i use the cruse control i get best mileage at 65, the tow haul is the best thing going,

[Sfla2]

If you get a scan gauge it has a command called lod which is the load % of eng you are using this is from manual
This is a percentage of the maximum power available currently
being generated. In some vehicles it is the maximum
available at the present RPM. it really helps as i stay just under 60% which is my sweet spot, any highr can see MPG fall

[carringb]

hanko wrote:


Oh we have 6 gears, where's the other one, I can only find 5

"4th" gear is actually two different ratios, that are not not used sequentially. So yes, the TorqueShift is actually a a 6-speed even though it only uses 5 at a time.