Hello everybody I am brand new to this forum. I used to hate diesel vehicles for no apparent reason but 12yrs in the Army and 8 stationed in Germany brought me around. I have a 93 3/4 Suburban with a 454 and it is 4x4 and as my son calls it a beast. It also gets about 8mpg so this means even though I want to drive it everyday I can't afford it. My question is can a conversion be done that might get at least 20 mpg. I believe a 6.2 or 6.5 will bolt directly to my trans. Does anybody know if this is true or have any knowledge of a better conversion. Thank you.