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

Since there aren't a lot of variables with the V-10 besides wheel size, the other posters have given you the info you need....somewhere between 60-65. I find that all RV's have a spot where they settle in and run their best. For example, that may be 62, 63 or 64. Drive it for awhile and see where it likes to run.

X2 on 60-65. Just drive it! Don't even calculate gas mileage, its too depressing.

Ramair wrote:

lostdog wrote:
I run about 63 MPH which works out to about 2200 RPM. Average about 7 MPG.

That's about right, I run 65 and pulling my 2012 Chevy Cruze I average 7-7.5 mpg and without towing average is 7.5-8 mpg. I have the 22.5" wheels not sure what wheel size you have. The V10 is a great engine and I have had no issues with it.

22.5 wheels.

Between 60 and 65 mph is the best speed with the best mpg without going to slow.

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.

Lowest is best for fuel economy in the V10, but that depends on terrain. Keeping it a little faster, so it doesn't downshift on rolling hills will net better economy than going slow enough it has to downshift constantly.

I do highly recommend a tuner from 5-star. Their tunes will help it climb in OD more often, and not be as "shifty".

lostdog wrote:
I run about 63 MPH which works out to about 2200 RPM. Average about 7 MPG.

That's about right, I run 65 and pulling my 2012 Chevy Cruze I average 7-7.5 mpg and without towing average is 7.5-8 mpg. I have the 22.5" wheels not sure what wheel size you have. The V10 is a great engine and I have had no issues with it.

Hi,

If I go 49 mph rpms are about 1800. If on the level I average 10 mpg. I weigh at 13700 lbs fully loaded in a class C.

Depends upon the differential ratio and wheel size. Not all are alike.

Gear ratio and RPM are a science.

I second lostdog!