Awesome car made better with HHO system. I wouldn't bother with a VW that's not diesel, why would you? 40-50 mpg race car! How can you get any better?
The engine, of course.
HHO, deal with a reputable company that has a professional looking system and lots of experience. No do-it-yourself. If you hook it up without putting correctly into the fuse box to a connection that turns off automatically, you will blow it up if it runs all the time!
† Edmunds.com received the highest numerical score in the proprietary J.D. Power 2014 Third-Party Automotive Website Evaluation Study℠. Results based on responses from 3,381 responses, measuring 14 companies and measures third-party automotive website usefulness among new and used vehicle shoppers. Proprietary study results are based on experiences and perceptions of owners surveyed from January 2014. Your experiences may vary. Visit jdpower.com.