Hey guys, just wanted to check with some other gas owners. I have an 04 2500hd ext cab 4x4 and can only seem to muster 10-11 mpg. I've been considering a diesel because I do a little towing and then my mpg is 0nly 8-9. Is this about right for a 6.0. I see some people saying that they get 15-16. I don't get on the gas at all either .