I have seen stickers on some engines, namely the 717s BR715 and more specifically on airTran's 717s that say USE ONLY BP TURBO OIL 2197.
Now I have to wonder, what if BP Turbo Oil 2197 is NOT used. What if Aeroshell is used, or BP Turbo Oil 2380. Will it damage the engine? I just have to wonder why an engine manufacturer specifies a specific type of oil. I use Mobil 1 in my car, but I know I can use Pennzoil, Valvoline, or anything else. Now, before anybody says "Your car engine, and a jet engine are very different." Let me say, I know that lol. However, I am just wondering what would happen if a mechanic were to use BP Turbo Oil 2380, or Aeroshell.
On a side note, Is Skydrol the only hydraulic fluid that can be used in an aircraft, and does it matter if it is LD-4 or B500?
Google Fails to answer these questions.