Archoil AR9100 Oil Additive (16oz) for All Vehicles - Powerstroke Cold Starts, Eliminates Injector Problems 16oz AR9100 Friction Modifier- Treats one PowerStroke Fixes 6.0 and 7.3L PowerStroke Cold Start Injector Problems. For gasoline and diesel engines, gearboxes, hydraulics, differentials and power steering systems. Reduces wear and extends component life Reduces engine noise, vibration, and friction heat.