Castrol Classic XXL40 monograde SAE40 classic engine oil - 1 Gallon / 4.54LCastrol Classic XXL40 is a high quality, Low detergency traditional mono grade engine oil for single and multi cylinder engines that pre date 1950 in cars and pre date 1970 for motorcycles, this oil can cope with both road and competition conditions. Unlike modern engine oils, this Castrol classic lubricant is low detergency, this can be essential for any un restored or unknown condition engines where deposits may be sealing the engine block, a high