Fossil fuel
| Produces |  Oil refinery |
| Production of |  Glass,  Silicon |
| Upgrade HQ | L5 (3 000 000) |
| Upgrade buildings |  Haulage firm |
| Recycles from |  Used oil,  Maintenance kit |
Fossil fuel| Produces | Oil refinery |
| Production of | Glass, Silicon |
| Upgrade HQ | L5 (3 000 000) |
| Upgrade buildings | Haulage firm |
| Recycles from | Used oil, Maintenance kit |