My SHO sometimes sits for as many as 10 days without starting. Before I start it (I call it my dry start protocol), I press the brake and gas to the floor and push and hold the start button. This allows the engine to spin with over without starting. I do this for about 10 seconds and then start my SHO like normal. This allows the oil pressure to build and get oil into the valve train and other areas. I also do this after every oil change.