Found white sludge under engine oil cap | IH8MUD Forum
sludge under oil filler cap - BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)
Heard of the 'Black Death' in engines?
Audizine Forums
Engine Sludge Causing Smoking on Starting - Can it Be Fixed? - Maintenance/Repairs - Car Talk Community
Moisture in your oil. | Polaris Slingshot Forum
If I look under the engine oil cap and see a sludgy mess instead of regular oil, do I need an oil change? - Quora
White Stuff Under the Oil Cap: Causes, Fixes & More | dubizzle
What is this white residue on my oil cap? : r/MechanicAdvice
Yellow sludge on oil cap and fill tube - Ford Truck Enthusiasts Forums
Found this weird sludge on the underside of my oil cap. What is this?/Should I be worried? : r/MINI
Sludge underneith oil cap - Toyota 4Runner Forum - Largest 4Runner Forum
Tan / Yellow Sludge Pudding Under Oil Fill Cap | VW Audi 2.0T - YouTube
Brown Sludge on oil filler cap and dipstick
Milky, Frothy Engine Oil: Should I Worry? :: YummyMummyClub.ca
Yellow sludge oil cap ?? | ClioSport.net
Noticed a rusty orange color inside oil cap and down filler tube. | Chevy Tahoe Forum | GMC Yukon Forum | Tahoe Z71 | Cadillac Escalade - Tahoe Yukon Forum