Hello everyone! As you can see, I'm fresh and new here and have been trying to get a better understanding of oil and what kind of life blood I am and should be putting into my car. A little info about my car since it'll be needed in the oil decision process: 2009 Chevrolet Cobalt SS Turbo 2.0L Direct Injection Turbo Motor (EcoTech) Factory Fill Oil: Mobil 1 5W30 Full Synthetic I have done many modifications to this car and it is my DD. Modifications are: Intake, full 3" turbo-back exhaust - NO CATS Charge piping, bigger intercooler Tuned to 24psi on stock turbo (stock is 15psi max) - I'm at the end of the efficiency range of this particular Turbo (K04) The car currently puts down about 318WHP and 382WTQ Stock it put down 230/230 respectively. Car has 50,200 miles on the odometer. The motor has been rebuilt 5,000 miles ago with new factory pistons, bearings and new factory head because of a thermal failure. I ran factory recommended Mobil 1 5W30 the whole time and for the first oil change after the rebuild. I change my oil religiously EVERY 3000 MILES. I just switched to Pennzoil Ultra 5W30 after reading some good things about it and how well it is "supposed" to be with Direct Injection motors. I still don't fully understand this yet. My driving habits vary. It is my DD so I drive it to work mon-fri about 25 miles total a day. I do random trips to the store here and there and sometimes ride around on the weekends. I never drive the car until the coolant warms up over 100 Degrees and I never get past 3000-3500 RPM until it is up to full operating temp. NOW, I DO bring this car to the drag strip on occasion and that is my main concern for my choice in oil. I do like to get on it from time to time, redline 2nd and 3rd gears while getting on the highway so it does see it's fair share of hard times. Should I be draining my oil and using something different for a couple runs down the drag strip or is the factory 5W30 fine for the occasional trip there? My understanding of oil is not fully evolved yet and I am trying to get a better understanding to better protect my motor with proper lubrication. Thanks in advance and I hope to get a better undertanding while I'm here!