14. COLD WEATHER OPERATION 14.1 PRECAUTIONS FOR LOW TEMPERATURE If the temperature becomes low, it becomes difficult to start the engine, and the coolant may freeze, so do as follows. 14.1.1 FUEL AND LUBRICANTS Change to fuel and oil with low viscosity for all components. For details of the specified viscosity, see “20. USE OF FUEL, COOLANT AND LUBRICANTS ACCORDING TO AMBIENT TEMPERATURE”. 14.1.2 COOLANT WARNING Keep antifreeze fluid away from an open flame. Never smoke when using antifreeze. NOTICE Never use methanol, ethanol or propanol based antifreeze. Absolutely avoid using any water leak preventing agent irre- spective of whether it is used independently or mixed with an antifreeze.
Do not mix one antifreeze with a different brand. For details of the antifreeze mixture when changing the coolant, see “24.2 WHEN REQUIRED”. Use a Permanent Antifreeze (ethylene glycol mixed with corro- sion inhibitor, antifoam agent, etc.) meeting the standard require- ments as shown below. With permanent antifreeze, no change of coolant is required for a year. If it is doubtful that an available antifreeze meets the standard requirements, ask the supplier of that antifreeze for information. Standard requirements for permanent antifreeze SAE ........................................................................................
J1034 FEDERAL STANDARD .................................................... O-A-548D REMARK Where no permanent antifreeze is available, an ethylene glycol antifreeze without corrosion inhibitor may be used only for the cold season. In this case, clean the cooling system twice a year (in spring and autumn). When refilling the cooling system, add antifreeze in autumn, but do not add any in spring. 2-99