I won 12 quarts of Driven DI-40 motor oil from LN Engineering. This oil sells at $14/quart and I feel a little guilty using it in my GTS. I have always changed oil using Mobile 1 at 3000 miles (once a year) and it has been adequate for my driving. Blackstone Labs tells me my engine is in great shape and I am essentially wasting oil.
I would like to sell the Driven oil to someone who could use it better than myself. If you have a direct fuel injected Porsche, the DI-40 is the formulation for your car.