I wasn't a fan of the stuff before, but a lot of the Saab tuners are making E85 tunes now because the cars in Europe get the BioPower system. With nothing more than a slightly larger compressor wheel (18t), injectors, and 3" downpipe there is one tune out now that makes 320hp/350 ft. lbs. on E85 and that's a very conservative tune. That's on a 2.0 turbo that makes 210hp/220 ft. lbs. stock. I'm really considering going this route with my car if I decide to keep it.