I have a 06 ctd auto 9k miles been to the dealer 4 times with no results.
Im getting between 8. 5 in town 11 hyw, Had two buddies buy same day at DSM and their getting 15 to 18.
Went to DDP had injectors tested and were fine, lift pump was good, dyno'd at 238 rwhp where most 325/610's...