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Condensation under Oil Cap?

Condensation under Oil Cap?

Postby dan61psu [OP] » Jan 28 2013, 3:57pm

2011 Silverado 1500 w/ 5.3.

Changed Oil last weekend at about 17K miles. The truck at about 1-2 quarts of oil over the interval (7K miles). When i went to refill after draining, I noticed condensation under the oil cap. When i wiped it out, it was reddish-brown.

Is this a normal occurrence in the 5.3? I've never noticed condensation under an oil cap in 15+ years of changing oil in cars...

Thanks!
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Re: Condensation under Oil Cap?

Postby MOS95B » Jan 28 2013, 4:03pm

As far as I know, condensation under the oil cap is relatively normal for all engines.

The most generic reference I could find was from Mobil 1 - http://www.mobiloil.com/USA-English/Mot ... l_Cap.aspx
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Re: Condensation under Oil Cap?

Postby steved » Jan 28 2013, 4:19pm

Yes, its normal unless you drive interstates for long distances where the entire engine can get hot enough for it to dry out...my Wife's Forester FXT has the same issue, but I have never had moisture show as a contaminant in a UOA. The truck and my POS Outback neither have the issue, but I put the them on the road for an hour at a time at highway speeds, so they get hot (and I use the same oil in all of them).
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Re: Condensation under Oil Cap?

Postby dan61psu [OP] » Jan 28 2013, 5:29pm

OK - guess i just never noticed before...thanks all.
2011 Silverado Crew Cab - Z71 - Sheer Silver
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Re: Condensation under Oil Cap?

Postby Neal » Jan 28 2013, 5:39pm

My 2000 Silverado 6.0 would do this on normal back and forth trips to work and around town. A short trip on the interstate would clear it right up. Have not checked on my 2012 5.3 yet.
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