Keep your car s engine humming happily along with Castrol HD SAE 30 Motor Oil. Formulated by the experts at BP this solution is enhanced with unique detergents anti-oxidants dispersants and varnish inhibitors. Regular maintenance with this SAE 30 Motor Oil keeps your engine lubricated extending its life and contributing to improved overall operation. The formula also provides extra protection against thermal breakdowns in warm temperatures 60 F and above so you can spend less time along the side of the road with your hazards on! With Castrol s proven formula you can spend more time cruising down it.