To mitigate combustion problems caused by cold oil, you should?

The correct choice emphasizes an effective approach to address combustion problems associated with cold oil. Increasing pump pressure aids in enhancing the flow of oil, ensuring that it reaches the combustion system more efficiently. Utilizing a nozzle line preheater is particularly effective, as it warms the oil directly before it enters the combustion chamber, thereby preventing issues like incomplete combustion or no-firing due to the oil being too viscous.

Blending kerosene or additives with fuel is also a practical strategy; kerosene has a lower freezing point and can reduce the overall viscosity of the fuel mix, promoting better combustion, especially in colder conditions. This multifaceted approach effectively combats the challenges posed by cold oil, leading to consistent and efficient heating performance.

In contrast, lower-quality oil can lead to increased impurities that might exacerbate combustion problems rather than mitigate them. Lowering pump pressure may actually hinder fuel delivery and exacerbate cold oil issues, while allowing oil to warm naturally could take too long and still allow for combustion issues to arise if temperatures remain low.