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Vehicle Information: Model : 997; Year: 2005; Mileage: 5300;

When removing the cap from the oil filler "neck" I notice a yellow residue on the cap and in the filler neck.I seem to remember the same situation on my 996. It almost seems as if the oil was foaming and left this residue. Is this something to be concerned about. I have not had the car back to the dealer to ask them but am concerned because of the long recomended service interval between oil changes. In the 5300 miles traveled the engine has used one quart of oil. I consider this normal considering the break in period and relatively easy use.For the record, the car has been relatively maintence free with the exception of a replacement airbag sensor, check engine light reset (once) and a minor radio adjustment to fix the stereo indicator light.

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