Related Clues:
- Refined stuff, usually
- Oman export
- Drilled commodity
- OPEC subject
- Water non-mixer
- Contents of some wells
- Reason for the Iraq war, according to many
- Upton Sinclair novel on which 'There Will Be Blood' is based
- Corn byproduct
- Fluid for a car
- Cruet fluid
- Source of the Beverly Hillbillies' wealth
- *Vinaigrette ingredient
- Persian Gulf commodity
- Refinery material