| 181 | Oil Circuit Breakers | Company Product |
| 182 | Oil Companies | Company Product |
| 183 | Oil Companies' Supplies | Company Product |
| 184 | Oil Compressor Hose | Company Product |
| 185 | Oil Consultants | Company Product |
| 186 | Oil Containers | Company Product |
| 187 | Oil Content Monitors | Company Product |
| 188 | Oil Control | Company Product |
| 189 | Oil Control Toner | Company Product |
| 190 | Oil Controlling Toner | Company Product |
| 191 | Oil Converter | Company Product |
| 192 | Oil Coolant Hose | Company Product |
| 193 | Oil Cooler | Company Product |
| 194 | Oil Cooler Gasket | Company Product |
| 195 | Oil Cooler Hose | Company Product |
| 196 | Oil Cooler Repair | Company Product |
| 197 | Oil Coolers | Company Product |
| 198 | Oil Dip Stick | Company Product |
| 199 | Oil,dipstick | Company Product |
| 200 | Oil Discharge Controls | Company Product |
| 201 | Oil Discharge Monitoring & Control Systems | Company Product |
| 202 | Oil Discharge Monitors | Company Product |
| 203 | Oil Drainers | Company Product |
| 204 | Oil Drilling Bits | Company Product |
| 205 | Oil Drilling Chemicals | Company Product |
| 206 | Oil Drilling Contractors | Company Product |
| 207 | Oil Drilling Equipment | Company Product |
| 208 | Oil Exploration Companies | Company Product |
| 209 | Oil Exploration Equipment & Supplies | Company Product |
| 210 | Oil Extraction Machinery | Company Product |