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2009 Corolla; rust in oil and on dipstick

#439660
johnzcarzjohnzcarz
Participant

    Is it really rust or deposits on the dipstick? I would wipe it off with a rag sprayed with WD40 and see if there is any sign of pitting on the dipstick itself. I bet there isn’t. To me it looks like combustion deposits & water vapor.

    Does your brother do a lot of short trips, the kind that do not let the engine get up to operating temp? Conventional oil or synthetic? How many miles between oil changes?

    I would do a quick search on Toyota and engine sludge since they have had an issue when using conventional oil + longer change interval. I’m not saying this is what he has, it’s just something to be aware of.

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