Vehicle cooling system

A liquid-cooled (10) automotive engine (12) has a high-temperature liquid cooling system (14) with a radiator (18), and operates separately from a lower-temperature circuit (20). The low-temperature system cools an engine oil radiator (24) and a turbocharge air radiator (22) served by a further radiator (26). The oil radiator (24) is also coupled to the high-temperature cooling circuit (14).