How fast do you go

We tow at 3 mph over whatever the limit for towed vehicles might be. I went to the trouble of changing the trailer tires to Endurances specifically so as to not be limited to 65. I am always confused by the statements that someone is not in a hurry to get anywhere. If I am going at all, I must be going somewhere to do something. Whatever that something is, it certainly isn't being done sitting in a truck cab. I'm jealous of those in states with higher limits. If I could, I would cruise at 75. Mileage? I don't even check. 18,000 lbs. and the aerodynamics of two 4 by 8' sheets of plywood being shoved down the road sideways. Whatever it is, it isn't good.

Cummins12V98 wrote:
What exactly does sweet spot at 68 mean?

optimum speed in the middle of the torque curve and best mileage

60 to 62, I also like to be able to STOP! I'm retired so not in a hurry. As someone say, I pull over if needed ' let people by!

60-62. Tires are rated for 65, and gas mileage drops a lot if I go faster anyway.

At least once a summer I get passed by someone going very fast towing a newer, probably stock trailer, and later see them off the side of the road with a flat. I think a lot of people don't know that most OEM trailer tires aren't rated for more than 65.

65 for me too. Passing will go to 70 or so as needed. We try to use secondary roads too when possible. Better gas mileage even with the stop and go. Less stress too!

On interstates I will drive at 63-65 mph, not matter the max limit. I just get in the right lane and stay there. Don't mind if folks are passing me on my left. On other than interstates, I'll drive 55-60.

My best gas mileage is at 55.

Usually around 70, which is hard for me because my last pickup liked 62, and got the best mileage there. If I try that with this one, the transmission is constantly shifting. If I drive 70, that gets me 2000 rpm, and it doesn't shift nearly as much as driving slower.
One time driving across the state, there was almost no wind. I told the DW that I was going to do a mileage test and didn't use the cruise control, which I usually do. I stuck it at 55 and held my foot steady, and let the speed drop uphill and raise on downhills. When we got to our destination 335 miles later, we got 9 mpg.

Next time I tried with similar circumstances on the same route, I put the cruise at 69 and we got 9 mpg. That does not compute in my mind, but I have repeated the test, and it is correct for my rig. If we have a side wind, I can be as low as 7 mpg only going 55. And unfortunately, this is repeatable. It hurts only getting 200 miles out of a tank on a bad day.

When we retire, I won't have to drive on the really windy days.

We rarely travel on the interstate. On the state and US numbered roads, I travel 55 to 60 mph. It gets me the best gas mileage. If traffic is heavy on those roads, I will push it up to to 60-65. If traffic starts to build up behind me, I pull over and let them go by if it is difficult to pass.

60 mph max, because that is the speed rating on our ST tires. Also, because a truck + trailer doesn't handle or stop as well as just a truck, even with a good setup. Emergency maneuvers (of course ) should be avoided if possible, but are much less risky at 60 mph than at 70 or higher.

We also get somewhat improved gas mileage over towing at higher speeds.

wanderingaimlessly wrote:

SoonerWing03 wrote:
When Towing on a highway where the speed limit is 70 MPH, how fast do you go?

According to my cruise control a half a mile per hour faster than the idiot in front of me.

That there is funny, lol