There's not exactly a downside to the ccv mod, any of y'all ever see a truck run away in person? I have, its ####ed up to sit there and watch an engine destroy itself, but that's what happens when it starts running on its own oil, hint hint from ccv, now granted if your truck runs away from too much oil in the crank case vent there are more problems, it would keep you from running away, as far as I know anyways