Bought 2 of these after the 5.3L in my '08 Tahoe dropped 2 cylinders at 147K miles. Stuck them in my Tahoe (after a new engine) and '14 Silverado to make sure I don't have problems in the future. Maybe slight decrease in fuel economy, but doesn't appear to be much. Provides some peace of mind which makes it worth it for me.
Mike from Texas
I recently took a 2800 mile trip and I only used 80 gallons of diesel going and coming round trip I get 40 miles to the gallon plus on the 6.7 Dodge Cummins diesel I'm very pleased with it I would recommend it to all diesel enthusiasts that want to save money on fuel and not only that I did not even use Maybe an eighth of a tank of DF fluid with that being said the power is all still there it works great I love it and I would recommend it to anybody very easy to install my truck has a 2015 Dodge