| Upgrade Level | Cost | Time Required | Items Needed |
|---|---|---|---|
| 1 | 1,500 | 30 Minutes | |
| 2 | 0 | 10 Minutes |
Clean Water x 20
|
| 3 | 0 | 20 Minutes |
Refined oil x 5
Saronite x 3
|
| 4 | 0 | 30 Minutes |
Thorium x 3
|