Any inflation pressure above or below the specifications will not provide the maximum traction. The proper inflation pressure can be found in the owner's manual or from the tire manufacturer. OIL-the owner's manual will identify the proper viscosity of oil for your car. Improper oils can overload starter motors or lead to bearing failure. There are special winter windshield wipers that have a special cover over the tension arms of the wiper that reduce ice build up.
Ice build up on the wipers can interfere with the wiping pressure of the blades.
In addition to the vehicle being in proper operating condition, there are some items that should be carried in the vehicle which may be helpful in an emergency. Emergency items take on special significance during long winter driving trips. The traction aids can be used to improve traction on icy surfaces in and around the driving wheels. Proper jump starting procedures are imperative or personal injury can result. Consult the instructions that came with the cables or the vehicle owner's manual.