Castrol � we Keep the World Moving; our Castrol� Edge� Professional is a full Synthetic Engine Oil - Exclusive to Car Dealerships and is Castrol's best Oil. this Product Features Micro-Filtration Technology to OEM Factory Fill Standards and is the World's first Carbon-Neutral Oil! Castrol Protection Plus is Castrol's Engine Warranty and Roadside Assistance Retention Program - Helping your Dealership Sell more Used Vehicles ...