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white milky substance in oil
What in the world is the white milky stuff in my oil tank?!
Never had a problem, no knocks nothing, no smoke!! 1985, 307,000 miles, 33 years Car has always runs great. img]http://forums.pelicanparts.com/uploads26/IMG_96411680297839.jpg[/img] |
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Navin Johnson
Join Date: Mar 2002
Location: Wantagh, NY
Posts: 8,787
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Spooge
Its an emulsion of oil vapor and water vapor
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Don't feed the trolls. Don't quote the trolls ![]() http://www.southshoreperformanceny.com '69 911 GT-5 '75 914 GT-3 and others |
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I ROC!
Join Date: Feb 2004
Location: Long Island, NY
Posts: 390
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In your air cooled motor, it's just water condensation mixing with oil causing that milky emulsion. If you drive the car regularly and get it nice and warm, it will disappear. You probably idled the car or started it without it getting up to operating temperature for long enough. That milky stuff appearing in a water cooled car is much worse...likely an internal coolant leak in the engine, usually where the heads/block interface.
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Should I worry?...anything I can do... clean it out somehow or just drive?
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Still here
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More Italian tuneups.
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This time of year with temperature swings, condensation can be expected form from the hot oil meeting any atmospheric humidity as engine cools. Not a bad idea to change both oil and gas cap gaskets. Residual moisture at most and a good run at operating temp will run it off.
For instance, it hit 67° today in Chicago, last night got down to mid/hi 30°’s. When this happens my garage floor starts sweating - but oil fill tube is clean. To help keep the garage humidity levels in check, a box fan helps with air circulation until the highs and lows stabilize. |
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I ROC!
Join Date: Feb 2004
Location: Long Island, NY
Posts: 390
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Just drive it and get it up to temp. Drive it like Dr Porsche intended.
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Registered
Join Date: Jul 2001
Location: Lawrenceville GA 30045
Posts: 7,378
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As the saying goes - Drive it like you stole it!
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Mark '83 SC Targa - since 5/5/2001 '06 911 S Aerokit - from 5/2/2016 to 11/14/2018 '11 911 S w/PDK - from 7/2/2021 to ??? |
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Registered
Join Date: Mar 2016
Posts: 917
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Time for an oil change. Then drive it and get it good & hot every time you take it out. Park in a garage if you can.
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change your oil more often and start driving it harder
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Thanks!! Motul 5W-40 toady!!
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PCA Member since 1988
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You don't need to change the oil, unless it's time to do it anyway. You MUST drive it longer to drive the water out. If you just change the oil, and drive it like you did, you will get that emulsion back.
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1973.5 911T with RoW 1980 SC CIS stroked to 3.2, 10:1 Mahle Sport p/c's, TBC exhaust ports, M1 cams, SSI's. RSR bushings & adj spring plates, Koni Sports, 21/26mm T-bars, stock swaybars, 16x7 Fuchs w Michelin Pilot Sport A/S 3+, 205/55-16 at all 4 corners. Cars are for driving. If you want art, get something you can hang on the wall! |
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I used to see this when my was working in gas stations in the ‘70s. I recall it was cars using Pennzoil. Condensation since there is no liquid coolant.
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no reason to worry. It is only on cold surfaces where moisture/vapor from water from combustion condenses on colder surfaces, and typically in the crancase vent hose, oil tank vent hose and filler neck. Not in the actual liquid phase. Get the oil to temperature with a spirited drive at and it disappears/reduces. The oil unless milky on the dipstick, is not compromised in itself. Any air cooled engine has it in the colder season. An oil change makes no difference to what you can see in the pictures. 307000 miles ! I must use my car more
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80SC (ex California) Last edited by trond; 04-02-2023 at 10:18 AM.. |
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thanks all! I got the temp up and then checked.. all fine!
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PCA Member since 1988
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Now, keep driving the snot out of it!
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1973.5 911T with RoW 1980 SC CIS stroked to 3.2, 10:1 Mahle Sport p/c's, TBC exhaust ports, M1 cams, SSI's. RSR bushings & adj spring plates, Koni Sports, 21/26mm T-bars, stock swaybars, 16x7 Fuchs w Michelin Pilot Sport A/S 3+, 205/55-16 at all 4 corners. Cars are for driving. If you want art, get something you can hang on the wall! |
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