On day 2 of the Big Oil job, complete the heist with the first engine being correct.



Once you get down into the basement you will need to locate the correct prototype engine. This is an intricate process that involves quite a bit of work and looking for clues. What I will do is give a quick run down and link you to the wikia that has all of the information you could possibly need.

Your correct prototype will have three components you need to get correct: correct gas tank color, correct number of nozzles, and correct pressure. After you choose the correct one you will need to bring it to the helicopter and wait for them to analyze it. If it was the correct one you have succeeded and the achievement will unlock.




15G