First Cadillac, first turbo, and first DI. Dealer takes care of all maintenance for the first 4 years. I checked with the service manager and they use Dexos gen2 in everything now, along with OEM filters. ATS forums are filled with catch can, check valve and other pcv modifications to help reduce intake junk. I drove this car, fell in love, bargained the dealer down like a mental case, and I could not stop driving it this evening. Wonderful chassis, strong engine, great torque. Thoughts, suggestions and ramblings are welcome.