If you did this stealthily, the alarm will now go off automatically. Activate the red flair, and wait for the helicopter. Once you are sure you have found the right engine, pick it up, and bring it back to the airstrip. Use all of this information to narrow down the possibilities. You can then look for the small, colored bottles inside the engines (orange, blue, or green). View the large white board in the entry area of the lab to see which substance has which bottle color. It will tell you whether the engine uses Nitrogen, Deterium, or Helium.

There is another clipboard with a green checkmark. These are the cables going from the top of the big blue bottle to the engine itself.ģ. It either says 1H (1 cable), 2H (2 cables) or 3H (3 cables). It will tell you how many cables the correct engine has. There is a small clipboard on one of the tables (random location) with some black text written on it. There is a little white watch at each of the engines, allowing you to see how many bars the engine has.Ģ. It will tell you whether the engine has more than 5812 PSI or less than 5812 PSI.

There is a computer screen with a PSI value in the top right corner.

The correct engine and clues change each time you replay the mission. The clues will help you in identifying the correct engine. It is recommended you complete Day 2 stealthily, as it gives you enough time to look for all the clues in the lab. The Big Oil job will become unlocked on your map after reaching Level 30.

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