Make sure your antifreeze is still able to protect your radiator and engine from freezing. A few dollars now will save thousands later. To self check you will need a hydrometer [antifreeze/coolant tester] to check the concentration of ethylene glycol antifreeze in the coolant, or a refractometer if you use propylene glycol antifreeze/coolant. A refractometer works with either type of antifreeze. A 50/50 mixture of antifreeze and water for adequate freezing, boiling and corrosion protection is a must for long engine life. A 50/50 mixture of ethylene glycol antifreeze should protect down to a temperature of -34°F, and a 50/50 mix of propylene glycol antifreeze down to -26°F.
You also need to check your ‘tire pressure’. You should check your tire pressure once a month regardless of the season. During cooler / colder months of the year, air pressure will drop. This will cause excessive wear and heating of the tire due to more rubber being in contact with the road surface. This also leads to premature blow outs which may cause you to loose control when driving at higher speeds. The same is true during summer / warmer months of the year. During warmer months, air will expand causing the tire to become over-inflated. As you drive the pressure will build to more than the tire is rated and to handle. Proper tire inflation is a must for safe driving. It also saves you money buy using less gas, and your tires will last longer.
I hope these tips will help you and your car!