My friend has a 2010 LMM that averages 8-10 mpg. What does he need to do to get better economy? He talked to a local diesel shop and they told him about deleting his DPF and tuning it. Lol they tried to tell him that Bully Dog was the best programmer :rofl So besides a DPF delete and tuning (I told him about EFI Live) is there anything else to he can do?