Shell is a car wash and auto repair shop in Catonsville, Maryland, at 925 Frederick Rd, Catonsville. Opening hours: Every day 5 AM–10 PM. Listed services: Gas station, Convenience store, Fast food restaurant, Oil change service, Wheelchair accessible entrance and Diesel gas and Mechanic and Debit cards. Call (410) 747-3663 to check prices or availability before you go.