Community Forums

rogbeis · 10-25-2018, 06:31 PM

If you are pushing an RV with a diesel engine you are much better to look at engine RPMs versus speed. Mine is a 330 horse Cummings ended like 1650 RPM's for the best mileage. Anything over that you can almost watch the fuel gauge drop.

Winterbagoal · 10-25-2018, 06:41 PM

2018 Navion 24V. Cruising at 62 to 65 on the freeways plus all other driving over several days average 15.1 mpg. Maybe 1 to 1.5 mpg less when towing our JKU. Different terrain and different grades.

revbilly · 10-25-2018, 08:08 PM

I've found that I get the best gas mileage with my F150 and TT at 60 mph.

pjb · 10-25-2018, 11:50 PM

My 2005 CAT recommendation is 1750 RPM for best mileage of 39' Providence. I usually average 7-7.5 mpg. Honestly, I don't pay much attention to the mileage, but the 1750 is about 62-66 MPH, a comfortable speed.

Ianto Jones · 10-26-2018, 12:06 AM

Quote:

Originally Posted by Hames57

Two reasons for running at 60 mph
Miles per gallon and safety in event of emergency.

So much this. We live in California, and sometimes go between NorCal and SoCal.

We stay in the truck lane, going the posted 55 max (often more like 51-54). We average 15-19mpg, and we feel SAFE.

If we are slower up a grade or around curves (Grapevine, or the 17 near Santa Cruz, or 74/79 through the San Bernardino National Forest), we use our hazards.

We also carefully cede ground to any trucks that want past.

We are in a 1990 Champion TelStar Class C, 23’.

carlgorski · 10-26-2018, 12:49 AM

Quote:

Originally Posted by Ianto Jones

So much this. We live in California, and sometimes go between NorCal and SoCal.

We stay in the truck lane, going the posted 55 max (often more like 51-54). We average 15-19mpg, and we feel SAFE.

If we are slower up a grade or around curves (Grapevine, or the 17 near Santa Cruz, or 74/79 through the San Bernardino National Forest), we use our hazards.

We also carefully cede ground to any trucks that want past.

We are in a 1990 Champion TelStar Class C, 23’.

Really. You are a hazard. Trucks have to pass you , hell everything has to pass you. You do that to get an extra 1 m.p.g. .

BobDye1 · 10-26-2018, 08:49 AM

When I go, I'm fueling the RV, me, and the dog. I set the cruise control at 55 and let everyone pass me. We (dog and I) pause at lots of rest stops and arrive at our destinations without stress and well-relaxed. We see lots of scenery and enjoy the trip.

jerichorick · 10-26-2018, 09:04 AM

Quote:

Originally Posted by clyde1949

New to RVing what is the best crusing speed for my Anthem and for best Fuel consumption i like the 61 MPH range even though towing in CA is 55MPH
im getting lower MPG than i thought i would get about 7PMG average

Do you use your Mode control? This is a econno mode switch. Red light on means you are in fuel saving mode. I turn it off on up hill grades when I am loosing speed, or if I see a big one coming up.
Just came down I-5 at 65 mph. Most of the trucks were doing around 60. No problems.

Winterbagoal · 10-26-2018, 09:13 AM

Quote:

Originally Posted by Winterbagoal

2018 Navion 24V. Cruising at 62 to 65 on the freeways plus all other driving over several days average 15.1 mpg. Maybe 1 to 1.5 mpg less when towing our JKU. Different terrain and different grades.

Sorry, didn't notice the "Entegra" forum part. Never mind.....

OldBeaver · 10-26-2018, 09:25 AM

About a month ago I did a mileage test driving my car about 500 miles each way.
Going one direction I drove rhe speed limit where possible 70-80 mph. Going back I set the cruise control at 55mph.
I was shocked at the results.
At higher speeds I got about 28mpg.
At 55 that increased to 33mpg if I remember correctly.
I plan on repeating this test because that is a huge difference.

My RV gets about 10mpg driven st about 60mph. I don't normally go much faster than that. It just does not feel that safe.

nothermark · 10-26-2018, 09:30 AM

Quote:

Originally Posted by carlgorski

Really. You are a hazard. Trucks have to pass you , hell everything has to pass you. You do that to get an extra 1 m.p.g. .

As I understand it the heavy vehicle posted speed limit in CA is 55. His speed is consistent with running with the trucks as he is supposed to do.

A lot of the rest of the country has a truck lane running ~65 because of
the governed trucks. A lot of us tuck into that line as it fits with the point where wind resistance takes a steep upswing and matches the speed rating for trailer tires and toweds.

If one does the math for a 500 mile day that is 7.7 hours @ 65 mph or 6.3 hours @ 80 mph. A lot of us think about the safety side of a problem at 80 vs 65. Are the risks worth an hour or so sitting around at the end of the day? It gets even better with those of us who only do 300 miles or so per day.

SStravels · 10-26-2018, 09:35 AM

I pull a Honda CRV and am limited to 65 mph. I set the cruise at 63 and just finished a 6500 mile trip. My mileage varies anywhere from low 8 to almost 12. We have checked it every fill up and am very satisfied with it. Our coach has a 300HP engine so we cant fly up hills like we see some but other than that it does fine.

LargeMarge · 10-26-2018, 10:27 AM

Our rig:
1997 Ford cabover housetruck.
Cummins 8.3 250/800 mechanical.
Allison 3060.
14,000# across the scales.
Fuel == used restaurant oil plus dinosaur.
Tire pressure == maxed at 105psi.

52mph at 1750rpm gives us >14mpg.
Cost per mile == about US$0.9 (nine cents).

Our situation:
We full-timed for decades.
We boondock exclusively.
Any way we look at it, full-time travel is much cheaper than a stand-still house. And more fun. And healthier.

Winterbagoal · 10-26-2018, 10:40 AM

Quote:

Originally Posted by OldBeaver

About a month ago I did a mileage test driving my car about 500 miles each way.
Going one direction I drove rhe speed limit where possible 70-80 mph. Going back I set the cruise control at 55mph.
I was shocked at the results.
At higher speeds I got about 28mpg.
At 55 that increased to 33mpg if I remember correctly.
I plan on repeating this test because that is a huge difference.

My RV gets about 10mpg driven st about 60mph. I don't normally go much faster than that. It just does not feel that safe.

I can push my mileage up to closer to 18mpg if I drop down to 55mph in the Navion with the 3L turbo diesel V6. I noticed it by accident a few months ago when our GPS decided to send us along some back roads, and the dash indicator of L/100km display just kept getting lower as the miles rolled by.