You need two keycards for Small Oil Rig in Rust: a blue card and a red card.

Quick Scoop

  • Required cards for Small Oil Rig
    • Blue keycard to open the blue-room and start the main puzzle.
* Red keycard to open the inner locked door/loot room inside that blue-room.
  • What they’re for
    • Using only blue gets you part of the way, but you’ll miss the best locked loot.
* Bringing **both blue and red** lets you run all the card-locked loot on Small Oil and fully clear it.
  • Do you need a fuse or code?
    • No fuse is required specifically for the basic Small Oil Rig keycard progression described here.
* There’s also **no keypad code** ; access is handled entirely via keycards and the puzzle doors.

Mini FAQ

Q: What cards do you need for Small Oil Rig?
A: Blue and red keycards if you want all the main loot rooms.

Q: Can I do it with just one card?
A: You can use just blue for some access, but you’ll be locking yourself out of the red-door loot, so most players always bring both.

Information gathered from public forums or data available on the internet and portrayed here.