Depends on if you do it yourself or have someone else do it. $1,000 to $5,000 depending on make, model, size of tanks, certifications and if you have it done by a certified professional (so you can then get state / federal tax rebates)
25 posted on 07/21/2008 9:11:58 PM PDT by taxcontrol
I had heard that getting EPA, etc. certifications was quite costly as in several thousand dollars over mechanical work. Fuel though was less than 1/4 gasoline for same mileage. It sounds like the main impediment is useless regs.
26 posted on 07/21/2008 10:45:04 PM PDT by count-your-change
(you don't have to be brilliant, not being stupid is enough.)