Let’s hear your best MPG and driving style ?

Let me throw this out there !

If you could improve your MPG by modifying your driving style a bit ... would you do so ?

And let me warn you .... some people are going to HATE ME for me posting my numbers

1996 Damon Intruder with the almighty 460 Engine in it I get 6.1-to 6.5 mpg towing or not towing. this is at an average 65 MPH.
Dad

Thor Palazzo 32' with 6.7 Cummins and no trailer returns about 11.5 at 65-70mph, 12mpg if I stay in the lower 60's.

Pulling a Ford Taurus on a dolly round trip from TN to the Grand Canyon it showed 11.1mph for the 4500 mile trip. I let the kids drive some as I got very sick and they drove about 75mph.

Pulling a three horse trailer with tack room I seemed to consistently get about 9.9mpg.

Wind speed and direction can alter the numbers 10-15% so I don't generally worry too much about "best ever" mpg, I just want to know how to plan a road trip. Also, if you run the roof air, the household fridge and the microwave oven while traveling do you count the generator fuel which comes out of the same tank?

All in all, the 32ft diesel returns much better fuel economy than the 1991 F250 gas with slide in camper so I am very pleased with it.

I used to check fuel mileage several years ago and was getting about 9mpg. Haven't checked it in many years because it wouldn't make any difference if we got 5mpg. Either way, we will be hitting the highways and seeing the country. I set the cruise control at about 64 mph which seems to be the best mileage according to how fast the needle on the fuel gauge moves...lol

I average 5.6 towing my 13 Explorer with 4 bikes with our 12 Georgetown with the V-10 and 5 speed auto at 70mph. slowing down to 65 doesn`t seem to change the mileage any. without the Explorer I`m around 6.5. GCW at 26,300lbs.

Cat said that the best MPG is achieved when you are running at the RPM WHERE THE HIGHEST TORQUE IS ACHIEVED. We ran a 100 PRM above that suggestion. For us that was ~60mpg! We found lower elevations resulted in higher MPG. When the sulfur content of the fuel was reducing we lost ~0.3 to 0.5 mpg. We log all fuel mileage. We also set Tire pressure per the tire manufacturers recommendation based on 4 corner weights. We ran a TPMS to monitor tire pressure. We rarely utilized full acceleration starts.

Damon Intruder (2005) 377W Workhorse. 8.1L vortec 100 MPH tail wind I mean dead astern tumbleweeds going straight down the freeway 13.8 MPG

7.25mpg going 65-66 while using cruise control. Cruise control works quite well on our rig. I also keep the jake brake off.

I was going across The Bonneville Salt Flats on I 80 one time. It is very flat and there was no wind that morning. About 50 miles of flat, straight road.

I experimented with going 65 MPH for five miles and then 55 MPH for five miles. And then 65 MPH for five miles and then 55 MPH for five miles again.

My instantaneous MPG readout stayed pretty much the same for both speeds so I'm in the camp that says it doesn't make that much difference.

I've averaged 7.1 MPG over 95,000 miles. I recorded ever gallon of gas I put in the RV over the past 14 years. I don't care what it costs and will go to the gas station that is empty as opposed to going in the cheap places where I stand a chance of being hit by some nimrod.

Back in the old days, folks tracked fuel mileage as a method to monitor the health of their engines and as a means to detect problems early on. With the advent of computer monitoring systems in all engines these days that is no longer necessary. I know nobody who has a motorhome or large modern RV who would would ever make a trip go/no go decision based on fuel mileage.

Since most of us have no intention of making our travel plans around fuel mileage and the fact that it is no longer necessary for maintenance purposes, most of us simply don't bother or care what our mileage is.

Regarding shopping for price, I doubt very many folks do that to any great extent. I'm more likely to use the stations that appears the easiest to get in and out than I am to use the one with the cheapest price.

The fact of the matter is that, other than for bragging purposes, fuel mileage just doesn't matter. By the way, I get half a tank between fill ups. That's about as accurate as I can get. ;)