Battery

• Check the clamps on the battery terminals and make sure they're clean and securely connected. If they are, your battery may be weak. Jump-start your car or buy a new battery.
  
  

Thick Oil

• If your car engine won't turn over at all, the problem may be thick oil. Make sure your oil's viscosity is 5W-30.
  
  

Fuel Line

• Condensation forms in gas tanks that aren't full. Ice then forms in the fuel lines. Keep the gas tank as full as possible and make sure your fuel and air filters are clean. Use gas line antifreeze.
  
  

Drive Belts

• Rubber dries out and cracks. If a belt fails, the car won't start. Check drive belts for cracks, soft spots or bulges and replace old belts.
  
  

Ignition

• A cracked distributor cap, an old condenser, frayed spark plug wires or dirty spark plugs can all cause starting problems, especially if it's wet and cold.