2012 Subaru Forester Owner's Manual - Page 378

8-8 Driving tips . Frequent driving of an AWD model under hard-driving conditions such as rough roads or off roads will necessitate more frequent replacement of engine oil, brake fluid and transmission oil than that specified in the maintenance schedule described in the "Warranty and Maintenance Booklet". Remember that damage done to your SUBARU while operating it off-road and not using common sense precautions such as those listed above is not eligible for warranty coverage. Winter driving 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 30% 50% 100% Freezing Temperature 10.48F (−128C) −48F (−208C) −498F (−458C) & Operation during cold weather 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 suitable grade and viscosity for cold weather. Heavy summer oil will cause harder starting. Keep the door locks from freezing by In order to prevent freezing of washer fluid, check the freezing temperatures in the table above when adjusting the fluid concentration to the outside temperature. If you fill the washer tank with a fluid with a different concentration from the one used