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Cars & Vehicles
Oil and Oil Filters
Ford Ranger XL
BP Oil Spill

What does white deposit on the oil filler cap mean?


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Wiki User
January 19, 2008 6:04PM

If you are not loosing any coolant then it is more than likely condensation, caused by short driving trips. A good long trip will help remove this. However, if you are having to add coolant, then you need to have it looked at by a professional. You may have coolant entering the lubrication system. This can be very serious. You may have a leaking head gasket. It will only get worse.