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yellow sludge material on motor oil cap | BimmerFest BMW Forum
Noticed this yellow stuff under the oil fill cap. Should I be concerned? (2007 Subaru Outback xt) : r/AskMechanics
Yellow gunk under oil cap — Ricks Free Auto Repair Advice Ricks Free Auto Repair Advice | Automotive Repair Tips and How-To
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Yellow stuff in oil cap - NASIOC
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Yellow stuff under oil cap | Mercedes-Benz Forum
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yellow-ish stuff on engine oil cap (BMW) | Overclockers UK Forums
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)
Yellow + brown stuff on oil cap?? | ClioSport.net
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Milky, Frothy Engine Oil: Should I Worry? :: YummyMummyClub.ca
Yellow "gunk" on my oil cap??? | Chevy Tahoe Forum | GMC Yukon Forum | Tahoe Z71 | Cadillac Escalade - Tahoe Yukon Forum
Does anyone know what this yellow stuff is on my oil cap? And is it a bad thing? : r/MechanicAdvice
what is the yellow gunk on inside of engine oil fill cover - Toyota 4Runner Forum - Largest 4Runner Forum
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