Subaru Impreza Manuals 2015 Impreza Owner's Manual | Page 462

8-8 Driving tips/Winter driving Winter driving & Operation during cold weather ! Maintenance Carry some emergency equipment, such as a window scraper, a bag of sand, flares, a small shovel and jumper cables. Check the battery and cables. Cold temperatures reduce battery capacity. The battery must be in good condition to provide enough power for cold winter starts. It normally takes longer to start the engine in very cold weather conditions. Use an engine oil of a proper grade and viscosity for cold weather. Using heavy summer oil will make it harder to start the engine. Keep the door locks from freezing by squirting them with deicer or glycerin. Forcing a frozen door open may damage or separate the rubber weather strips around the door. If the door is frozen, use hot water to melt the ice, and afterwards thoroughly wipe the water away. Use a windshield washer fluid that contains an antifreeze solution. Do not use engine antifreeze or other substitutes because they may damage the paint of the vehicle. SUBARU Windshield Washer Fluid contains 58.5% methyl alcohol and 41.5% surfactant, by volume. Its freezing temperature varies according to how much it is diluted, as indicated in the following table. Washer Fluid Concentration Freezing Temperature 30% 10.48F (−128C) 50% −48F (−208C) 100% −498F (−458C) In order to prevent fre W