OMG...Anyway This is what I have:2004 4x4 6.0L ext. cab shortbed with roughly 20K on it now.I tow a 2005 Jayco 29FBS or a 1998 2050 Bayline Capri.Installed a tune.Emtpy run around 13-14 mpg with a mix of city and highway driving. (still working on i...