I'm interested in hearing what MPGs everybody else has been getting out of their 12v. I did a forum search but it sucks and I couldn't find another thread discussing this. If there is, just link to it and I'll contribute to that one!
I've been getting into hyper miling sans the crazy stuff, and I'm averaging 30-31 out of my Passat on each tank. I regularly get 33-35 on my 20 mile commute to work, which is 90% highway.
What about it? I've heard others brag about getting 40-44 out of their Passat, but I'm having a bit of trouble believing that. Let me know if you've done anything to get better mileage. That said, NO this is not meant to be a thread discussing the ins and outs of hydrogen generators (been there done that on WAY too many forums).