Ford F-Series, Ford Super Duty, Ford Diesel
I took my 2019 Supercrew 3.5L V6 Ecoboost F-150 in for the Cam Phaser replacement, per the recall, and since have experienced a decline in gas mileage.
Historically, my truck was getting the advertised 19 mpg, and often was over 20, even in the city (which for me still has a good bit of ighway...