A farmer I know runs all his vehicles (including tractors) on bio-diesel without having to change any of his regular maint. Every season he changes all the filters anyway and says that he doesn't notice any difference in performance one way ot the other.

I am really interested in find out more about converting a car to run on Brown's gas.

The main reason I don't like "hybrid cars" is the attitude of the owners (or at least all those I have met/work with).