NapaBavarian
Dually driver 6.9
Decided to give it a shot to see if it really did any good, noticibly quieter, I checked fuel economy, typically and consistantly 14mpg, but this time it made 15mpg, and felt like more power. To double check I only used it in my front tank and as soon as I switched back to the rear tank all the grumpyness came back, filled up today with addative in both tanks and she is happy again