268. Various tests while conducting a fuel oil analysis can be performed on board to facilitate proper fuel storage, handling, and treatment. What tests are most important for determining what temperatures to maintain throughout the fuel forwarding and service systems?

Pour point and viscosity are critical for determining fuel temperatures because they directly impact flowability and viscosity, ensuring proper handling, injection, and combustion. The pour point indicates the lowest temperature for fuel flow, while viscosity measures its resistance to flow, both of which dictate necessary heating to maintain pumpability and achieve the required viscosity at the engine inlet.