it only takes a few seconds to destroy an engine if its detonating badly (no detonation is good BTW!) but i wonder if the knock sensor has been done away with or is not used in the current setup? that should of saved it by retarding the timing. on another note a friend of mine mapped his turboed car on optimax and if filled with normal fuel it would pink, he bought what he thought was optimax from shell one day and when he drove up the road the car was pinking badly on boost!? Can only think someone put the wrong stuff in the wrong tank