I was running 5W30 in my civic D16Z6 engine, but its boosted and i just currently overheated the car due to oil breakdown(i think the turbo broke the oil down) and scorched all my pistons and even the sides of my cylinders a lil bit , i replaced that and im currently running 10W30, not running the car hard because im not sure what kind of oil to run with a turbo, I was talking to a few buddies and they said to run 25W50, Pensoil GT Racing Oil,a regular mineral based oil its not synthetic. Im thinking that this will help keep the car cooler and protect my parts under excess heat. Future plans are to install a bigger radiator and a oil cooler. I was just wondering if this is correct, if this is the right oil to run. Thnaks.