Bell Hammer Seven and Bell Hammer Light should be used up in one time, but what inconvenience will happen if they are not used up?

The notation "use up all at once" is included for the sake of convenience, as it may be troublesome to measure each time it is used, or the amount used cannot be neatly divided, resulting in excess. In reality, however, it is possible to store engine oil for a long period of time without any problems by using 5% to 10% of the total amount of engine oil as a guide and storing the remaining amount tightly corked.