 10 times better performance can make a big difference. Castrol Edge motor oil gives your engine 10 times better high-stress performance. Castrol Edge, better oil for maximum performance. Now through December 28th, Castrol Edge and Edge high-mileage motor oil are on rollback at Walmart. WTLS Tallahassee, Pike Road. Join Graham Dunn of River Region Sports. Weekdays from noon until 2 on Score 94 and Hit 106.