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fritz said:
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woody77 said:
I was at my dealers service dept. last week asking about the oil change intervals and he mentioned that Porsche had to revise their required oil changes down to 12,000 miles from 20,000 because original calcs were done using 20,000 km, not "miles", which I guess would make sense seeing that 20,000 kilometers equals 12,427 miles.
Considering the number of different people you would expect to check things like oil-change interval specs in a car company before they got approved for publication, printed and distributed to customers that kind of statement should have instantly sent your bullsh!t-meter to the top of its range. 
Oil change intervals for the 997 in western Europe are 30,000 km, which is the "rounded" equivalent of 20,000 miles, so I guess that burst your service tech's theory like a soap bubble. 
I would agree with you, as the sales manual given out at the introduction of the 997 (August 2004 in the US) specifically stated an extension of the service interval from 12,000 to 20,000 miles. I would assume that Porsche had a good translation done of the original one from German to English.
In any case, I will probably have my oil and filter changed in November, as it will have been one year.
Also, as an aside, my oil consumption dropped significantly after the first oil and filter change. During the first 5392 miles (about 8600 km), it consumed about 2.25 l of oil. Since then (I now have 9100 miles, or about 14600 km), I have only added 200 ml, and that was last week, after 3566 miles, or 5700 km.
I have read the arguments on this site about the reasons for changing or about whether one is overly concerned about oil and filter changes, but I will get mine changed in November as one year will have gone by. Spending $200-600 US (including changing air filters) is inexpensive as far as I am concerned. If I had more time, I'd do most of the basic servicing myself.
Jim
