Help with dd13 fuel economy

614944

{"text":"I have 5 dd13 in cascadias. 4 are day and and I is a small sleeper. My day and run here in Texas pulling dump trailers grossing 84k and are doing a little over 6mpg average. The one with a sleeper is running a flatbed on a dedicated haul about 230 miles one way and the same back. He grosses usually 76k or so and he's only averaging 5.5 mpg. They are all 410/1450 engines with ten speeds. Is there something going on with the one that's doing worse on fuel? They are all 2015 except the sleeper truck we bought used its a 2013","pics":"[]","canComment":true}

500185

{"replyTo":"","text":"Flatbed would always have worse fuel mileage than dump trailer","replyToPid":0}

386491

{"replyTo":"","text":"What speed is he running at? He needs to find that happy median his truck likes to run.  At 67,68mph, I've gotten 7.8 mpg. At 70mph, my mpg drops, at 65 mph, my mpg drops. Depends if the wind is pushing you or against you. if you're running i35, it's not too bad as if you were running i10 or i20.","replyToPid":0}