crazyal
Super Member
Enclosed trailers are a beast. I had a 26' 12k enclosed trailer I used to haul about 4.5K worth of race car/ gear once a week about 250 miles with my Tundra. The trip was about 30 miles on interstate, about 20 miles in towns, and the rest on local highways with lots of twisty hills. On the interstate there was a huge difference between 60, 65, and 70 mph.
60mph was easy and really didn't use much power. 65 mph was fine but I was on the throttle more but it didn't work the engine too much. 70 mph was very different. At 70 any gusts hitting the front of the trailer were immediately felt. To compensate I needed to use the gas quite heavily. Any headwind really made the engine work.
The trip included a 2.5 mile stretch of uphill on the interstate that I couldn't do anything more than 65 at the top of it. Very few trucks towing any weight can hold speeds higher than 65 on it. I averaged about 11.5 mpg. The only other truck I used was a 2003 1 ton GMC stake bed with a 6.6 diesel and the Allison transmission. That got about 14 mpg.
It's nice seeing some real world side by side information under about the same conditions.
60mph was easy and really didn't use much power. 65 mph was fine but I was on the throttle more but it didn't work the engine too much. 70 mph was very different. At 70 any gusts hitting the front of the trailer were immediately felt. To compensate I needed to use the gas quite heavily. Any headwind really made the engine work.
The trip included a 2.5 mile stretch of uphill on the interstate that I couldn't do anything more than 65 at the top of it. Very few trucks towing any weight can hold speeds higher than 65 on it. I averaged about 11.5 mpg. The only other truck I used was a 2003 1 ton GMC stake bed with a 6.6 diesel and the Allison transmission. That got about 14 mpg.
It's nice seeing some real world side by side information under about the same conditions.