[s-cars] Which oil/oil filter for UrS4

[Eric_R_Kissell at whirlpool.com]

I have actually heard it more common going the other way around - run
10,000 miles between oil changes but change the filter at 5,000.

As to whether this is a good practice, I cannot say.  Spend $20 for an oil
analysis at 5,000 mi and than again at 10,000 mi and see for yourself.

Eric