So i'm looking into a Subaru as one of my other threads had made clear, but i'm not so clear on the pzev. I know it is partial zero emissions, so fuel is shut off if the car is moving faster than the engine wants to go etc, but there are some things i'm not so clear of. First off, why does the PZEV engine make 175hp vs the standard engine making 170hp? Is there any adverse effect on fuel economy, cuz i have an 08 Outback which doesn't have the PZEV, and i'm getting 27/33 for my MPG, and i don't want it to go down a ton if i get a PZEV one. Any info on this topic would be nice.