Which class of supply includes petroleum, oils, and lubricants?

The correct class of supply that includes petroleum, oils, and lubricants is Class 3. This classification is specifically designated for fuels and lubricants necessary for the operation of military equipment and vehicles, which are critical for maintaining operational readiness. Class 3 encompasses various types of petroleum products, including aviation fuel, motor oils, and any other lubricants required by military personnel.

Understanding the classification of supplies is vital, as different classes serve distinct functions. Class 2, for example, pertains to clothing and individual equipment, while Class 4 is related to construction materials and fortification equipment. Class 5 is designated for ammunition and explosives, further highlighting the unique role that Class 3 plays in ensuring military efficiency through proper re-supply of essential fluids and lubricants.