My saturn does it off and on, mainly when the temp is warm, but the engine is cold. Amsoil and GC do it less frequently than mobil, but from what i was told that 1 second sound on my car was the timing chain ratcheting up hydraulicly. I always wondered if since it only does it when its warm out, is it the fact that the oil is warmed up a bit by the heat and actually at a viscosity that is a little thick for start. For example when i crank cold at 5:30 in the morning after its been sitting there all night, no noise. When i crank it to go home at 6pm after its been sitting all day in the 100 degree heat, noise.