Castrol 151B01 Heavy Duty HD 40W Conventional Motor Oil 1 Quart

Castrol HD Motor Oil 40 is a premium monograde oil engineered for greater protection against thermal breakdown in warm climate conditions. This heavy-duty formula is designed to protect engines from the extreme stress and searing heat of rapid acceleration, sudden stops and high revving.

Key Features:

• Provides maximum wear protection in warm climates
• Recommended for use when ambient temperature is above 60°F/16°C
• Contains dispersants, antioxidants, detergents and varnish inhibitors that help prevent ring-sticking and build up of harmful engine deposits
• Suitable for automotive gasoline engines where the manufacturer recommends an API SP or earlier specification SAE 40 monograde lubricant
• Exceeds all passenger car and light truck manufacturers' warranty requirements for gasoline and turbocharged engines where API SM, SL, SJ or SH is recommended

This 1-quart bottle provides dependable protection for classic cars, vintage engines, and applications specifically calling for SAE 40 weight monograde motor oil. The heavy-duty formulation helps maintain optimal engine performance in hot weather operating conditions.