^ really? Mine had been sitting for just over a month, with roughly a quarter tank of fuel. When it came off the road, it was running sweet, with no issues from idle to redline at any throttle. I got it back on the road the other day and went for a drive, and it pinged at 3500rpm in third, at only about 5psi of boost. Nothing has been changed except for the fuel is a month and a half old.
If your car has been sitting for any length of time with the same fuel, I wouldn't be using boost until you can put fresh stuff in. Sure it *might* not be a problem, but better than finding out the hard way with a hole in the block after a big hit of detonation.