What is considered within normal limits for the oil quantity in relation to the maximum level?

The correct answer is that an oil quantity within normal limits is 1 to 2 quarts below the maximum level. Maintaining oil levels within this range is crucial for the proper functioning and longevity of an aircraft's engine.

Having oil levels at the exact maximum can sometimes lead to issues such as oil foaming or excessive pressure, which could compromise engine performance. Therefore, while being at the maximum oil level is technically acceptable, it is prudent to allow for a buffer below that level to avoid potential complications.

On the other hand, exceeding the maximum oil level by 1 quart or more could create additional stress on the engine and its components. Hence, it's essential to adhere to recommended maintenance practices that suggest keeping oil levels slightly below the maximum to ensure optimal operation and reliability during flight.