Storage units are a great place to keep your car if you are not planning to use it for a while. However, while storing your car, there are certain things that you need to keep in mind to ensure that there are no damages caused to the car. To maintain your car, all the fluids such as oil and filter should be changed right before the storage. Add fresh fuel, with gasoline stabilizer, if required. If you putting coolant in the car make sure that its levels are proper.