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#1 (permalink) Old 12-13-2008, 12:13 PM
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Milky Substance under oil filer cap

I was changing my oil today, and when I went to put in the new oil I noticed that there was a little milky substance under the oil filler cap. I have seen this on other vehicles that I have had before. I just was wondering if this is bad, or what causes this. Thanks!


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#2 (permalink) Old 12-13-2008, 12:18 PM
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Re: Milky Substance under oil filer cap

I just changed the oil in my '08 the other day and noticed the same thing
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#3 (permalink) Old 12-13-2008, 01:10 PM
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Re: Milky Substance under oil filer cap

ANTIFREEZE in oil.........causes foam, or bad PCV.....
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#4 (permalink) Old 12-13-2008, 01:18 PM
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Re: Milky Substance under oil filer cap

Quote:
Originally Posted by NorthGaTitan View Post
ANTIFREEZE in oil.........causes foam, or bad PCV.....
Antifreeze in the oil causes milky oil, 99% of the time the milky oil under the oil cap is simply from condensation. This is more likely to appear when people only drive their vehicles short distances at a time where the engine doesn't have enough time to get up to temperature and boil off the moisture that has been pulled into the engine. This is especially so with oil filler caps that sit atop a filler neck instead of being directly on the valve cover.

I wouldn't be concerned, this is actually quite common with a lot of vehicles.

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#5 (permalink) Old 12-13-2008, 03:15 PM
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Re: Milky Substance under oil filer cap

LOL, I had the same issue today!!

I figured it was condesation, because it was only near the cap, and the oil itself was just black and had no milkyness (new word) to it.
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#6 (permalink) Old 12-13-2008, 03:55 PM
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Re: Milky Substance under oil filer cap

Yahooligan gives good advice. As long as the oil doesn't look like hot chocolate I wouldn't worry.

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#7 (permalink) Old 12-13-2008, 04:18 PM
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Re: Milky Substance under oil filer cap

I figured it was just condensation because like y'all said the oil that I drained out actually looked really clean for having 4500 miles on it, but it wasn't milky at all. thanks for the info!


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#8 (permalink) Old 12-13-2008, 04:33 PM
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Re: Milky Substance under oil filer cap

Hmmm...I wonder if the VK56 motor doubles as a cappuccino maker? Now I have to go check my oil cap.

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#9 (permalink) Old 12-13-2008, 06:05 PM
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Re: Milky Substance under oil filer cap

Try a cup or two, and report back.

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#10 (permalink) Old 12-13-2008, 06:43 PM
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Re: Milky Substance under oil filer cap

VWs are famous for this also. Yahooligan is right. It's just condensation more commonly found in vehicles that don't get up to full operating temperature long enough to burn it off.....also, it's more common to see in colder weather.

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#11 (permalink) Old 12-16-2008, 02:11 PM
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Re: Milky Substance under oil filer cap

Quote:
Originally Posted by Yahooligan View Post
Antifreeze in the oil causes milky oil, 99% of the time the milky oil under the oil cap is simply from condensation. This is more likely to appear when people only drive their vehicles short distances at a time where the engine doesn't have enough time to get up to temperature and boil off the moisture that has been pulled into the engine. This is especially so with oil filler caps that sit atop a filler neck instead of being directly on the valve cover.

I wouldn't be concerned, this is actually quite common with a lot of vehicles.
My 99' Grand Cherokee used to have this problem as well, Jeep actualy designed a different oil filler cap and neck to prevent the foam. but as everyone said before me, don't worry about it.
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