Traditional, non-detergent motor oil for 4-stroke petrol engines. Specially designed for the needs of Classic & Vintage cars. Higher viscosity prevents oil from leaking. Minimises engine noise. Monograde Oil for Summer. Ensures high temperature performance & best starting conditions in summer – thicker oil can maintain oil film at high temperature. Oil change every 600 miles. Service Classification: SAE 40 API SA 5 Litres