If I look under the engine oil cap and see a sludgy mess instead of regular oil, do I need an oil change? - Quora
Found white sludge under engine oil cap | IH8MUD Forum
Can someone tell me why this is what the inside of my oil fill cap looks like? : r/MechanicAdvice
The Thick, Greasy Yellow Motor Oil Under Oil Cap As Signs and Symptom of a Blown Head Gasket Stock Image - Image of machine, block: 243554851
Five Ways to Prevent Engine Sludge Buildup in Your Honda | Honda of Seattle Blog
Found white sludge under engine oil cap | IH8MUD Forum
What are the symptoms of an engine sludge? - Quora
Gray gunk in oil pan and under main cap bolts? - CorvetteForum - Chevrolet Corvette Forum Discussion
Oil cap sludge. | Abarth 500 | The FIAT Forum
Found white sludge under engine oil cap | IH8MUD Forum
Black sludge under oil filler cap,advice needed! | VW Golf R32 Forum
Orange/brown gunk on oil cap area - BMW M3 Forum (E90 E92)
White sludge on radiator cap. 2010 pathfinder 4.0L V6. Was doing an oil change and inspection. Im a 1st year mechanic, been in the field for 1 year now. What causes this?
Found white sludge under engine oil cap | IH8MUD Forum
Brown sludge in oil cap | BimmerFest BMW Forum
Brown sludge in oil cap | BimmerFest BMW Forum
what is this on the oil cap? : r/AskMechanics
Oil Cap residue - MBWorld.org Forums
Audizine Forums
Granville | What your Oil is Trying to Tell you About the Health of your Engine
Sludge on oil cap | Cummins Diesel Forum
Black sludge under oil filler cap,advice needed! | VW Golf R32 Forum
Black Sludge Under Oil Cap; Why? -
Gummy Oil Buildup on Oil Cap (pics) - BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)
Oil Cap Sludge | Cummins Diesel Forum
The Problem With Engine Sludge and How to Avoid it - Freds Auto Repair
Oil cap sludge. | Abarth 500 | The FIAT Forum
Found white sludge under engine oil cap | IH8MUD Forum
