Related Clues:

• It eases friction
• Squeak remover
• Pipeline product
• Much-discussed commodity
• ___ change
• Big Nigerian export
• Iraq export
• Standard offering of old
• Something good to strike
• Kind of leak
• Sunflower yield
• Big ___ (certain energy lobby, pejoratively)
• Viscous substance
• It made Jed a millionaire
• Feat of Klee