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Old 12-09-2002, 09:32 PM
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Gilly Gilly is offline
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Join Date: Mar 2001
Location: Evansville WI
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The change in recommendation to Mobil1 synthetic oil was anything but quiet. Letters were sent directly to the owners of the affected vehicles.
I believe the reason for the milky sludge on the bottom of the oil cap in cold weather is due to the fact that the cap and the neck the cap attaches to is plastic. It doesn't get as hot as the metal parts of the engine and any moisture in the engine tends to condense on these 2 parts. It isn't present in the hot months. It's almost like a first sign of winter when it appears and first sign of spring when it disappears. Fully heating the engine seems to help a little, but it seems like it's always there to a certain extent in cold weather.

Gilly
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