What is the preferred fuel for a BPU?

The preferred fuel for a Bulk Fuel Installation (BFI), which includes a Bulk Petroleum Unit (BPU), is JP-8. This is primarily due to its advantageous properties that make it suitable for military operations and various engine types. JP-8 is a jet fuel that offers a good balance between high energy content, low volatility, and excellent thermal stability, which ensures proper performance across a wide range of temperatures and conditions.

Additionally, JP-8 has a lower flash point than other fuels like JP-4, enhancing safety while still providing sufficient performance for military aircraft and ground vehicles. It is also designed to be compatible with a variety of aircraft and serves in multiple roles, making it versatile for bulk storage and distribution.

In contrast, the other fuels listed may not match JP-8's safety standards, energy density, or compatibility with military equipment, which is why JP-8 is favored in these scenarios.