DIFF Subgroup
F01M 5/001 Full Title
Heating, cooling, or controlling temperature of lubricant (arrangement of lubricant coolers in engine cooling system F01P11/08); Lubrication means facilitating engine starting
F01M 5/001 Heating, cooling, or controlling temperature of lubricant (arrangement of lubricant coolers in engine cooling system F01P11/08); Lubrication means facilitating engine starting