Hi guys, 2020 Western Star 4900SF. Engine Detroit DD13-with Automatic Transmission (Car hauler) MPG is 4.8, it’s Normal?

449144

{"replyTo":"","text":"run the first overhead about 100,000 miles. until then, drive it like you stole it! brand new trucks don't really break in until about 60,000 miles... the more miles you have the better things will be seated, and economy will go up. \n\nIf there's something wrong, hopefully it'll blowbefore warranty runs out!","replyToPid":0}

129290

{"replyTo":"

449144 发表于 2019-09-05 02:06:55 run the first overhead about 100,000 miles. until then, drive it like you stole it! brand new trucks don't really break in until about 60,000 miles... the more miles you have the better things will be seated, and economy will go up. \n\nIf there's something wrong, hopefully it'll blowbefore warranty runs out!

","text":"Thank you ","replyToPid":201906}

770536

{"replyTo":"

795154 发表于 2019-09-05 00:07:43 no - I would think there is either a computer setting issue or another problem-- but with all the other things that they put on  an engine to be environmentally friendly is actually more a problem than trying to help the environment-- that new it should run better - but if you are breaking in the engine- than it's not uncommon for poor fuel mileage until it's broke in-- I was see what the dealership tells you about it

","text":"the Steeler ship will tell you it's normal unless they can rake you over the coals for about 14 Grand","replyToPid":201857}

770536

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129290 发表于 2019-09-05 00:25:34 They told me nothing  is wrong, engine have a hard noises when i am pushing gas pedal, engine brake working very bed, (they told me brand new trucks don’t have hard engine brake anymore)). ) truck  is not rolling, when I putting out my leg from gas pedal turbo pressure is going down but RPM stays at around 1500. I don’t know what i can do. Two dealerships, both told me no issue and both charged me 600$.

","text":"check all of your air filters and air input he may have a clogged a mouse can drag lots of crap in your intake and cause that problem at a dealer wouldn't even notice it because their computers would not show an issue","replyToPid":201867}

129290

{"replyTo":"

770536 发表于 2019-09-05 07:18:55 check all of your air filters and air input he may have a clogged a mouse can drag lots of crap in your intake and cause that problem at a dealer wouldn't even notice it because their computers would not show an issue

","text":"Thank you, I will do. ","replyToPid":202060}

449144

{"replyTo":"

770536 发表于 2019-09-05 07:17:42 the Steeler ship will tell you it's normal unless they can rake you over the coals for about 14 Grand

","text":"no effing lie!","replyToPid":202059}