Grease Monkey is the thirteenth Job mission in Need for Speed: Undercover. It is similar to the previous mission "Loco."

The mission starts with the player driving along Alena Boulevard at 7:16 a.m. whilst in pursuit of another member of Hector Maio's crew whom is driving a Mitsubishi Lancer Evolution X. The player must take down the crew member to complete the mission.

Chase Linh calls the player and says that she thinks there might be a leak in the Tri-City Bay Police Department.

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