| Diesel MPG?
I have done a good bit of work fuel filters, air filter, 2 cans diesel purge directly threw the injectors not gas tank, and my mpg ranges from 19 to 21.8 at best. I am wondering where i should look next or is this acceptable MPG for a 300sd with 250k on the clock. I burn about 1 qurt in between oil changes and I have about 2 degrees chain stretch. My guess is the injectors? | 
