Fuel mileage do semis typically get without a load?

613060

{"text":"What kind of gas mileage you usually get with trucks when you ain't hauling nothing, especially with Detroit 60 series and Cat C 13/15s?  ","videos":"[]","link":"{}","pics":"[]","canComment":true}

662888

{"replyTo":"","text":"Little over 9 to 10 miles per gallon. ","replyToPid":0}

28367

{"replyTo":"","text":"depends on how you drive, & how the truck is set up. I can average a little better that 8, 8.5 empty. more on flat ground, less on hills. loaded with 40,000, I get about 6 in the hills, 6.5 on flat. i have an overall average of about 7.","replyToPid":0}

462372

{"replyTo":"","text":"empty without a trailer, 10+, with empty trailer, 8-10","replyToPid":0}