Related Clues

• Icky stuff
• Unwanted buildup
• Slime
• Sticky matter
• Greasy glop
• Greasy goo
• Crud
• Engine fouler
• Sludgy stuff
• Muck
• Slimy crud
• Gooey mass
• Slimy stuff
• Sticky stuff
• Greasy stuff
• Sticky residue
• Greasy residue
• Grime
• Oil filter accumulation
• Gooey dirt