| Answer | Crossword Clue |
|---|---|
| OPEC | Oil cartel's letters |
| OPEC | Oil cartel's inits. |
| OPEC | Oil cartel's initials |
| OPEC | Fuel cartel's letters |
| OPEC | Oil letters |
| SAE | Oil-can letters |
| STP | Oil treatment letters |
| OPEC | Oil cartel letters |
| OPEC | Oil-cartel letters |
| STP | Oil additive letters |
| SAE | Oil can letters |
| SAE | Motor oil letters |
| STP | Oil-treatment letters |
| SAE | Letters on oil cans |
| SAE | Motor-oil can letters |
| SAE | Motor oil can letters |
| SAE | Letters on motor-oil cans |
| SAE | Letters on an oil can |
| SAE | Letters on a motor-oil can |
| SAE | Letters on a motor oil can |
| SAE | Letters on a can of motor oil |
