I wasn't driving, so i will tell you what my wife told me. Driving down the interstate, engine light came on, and then a loud band. No sign of overheating before the failure. Started pulling parts off yesterday, and found a hole in the side of the block. Haven't removed the pan yet, but sounds like a rod came loose. No oil in the radiator or coolant. I changed my oil myself using 10w30 pennsoil, before switching to synthetic.