Quote Originally Posted by shadow View Post
DocWaldo had one of those trucks that ran on Natural gas. He said he loved it and the mechanics that worked on them said that the inside of the engine of a truck that had well over 100,000 miles looked like a brand new truck! Only down fall in my area is there aren't many stations where you can fill up.
To me, the biggest upside is how clean it burns, which should allow for longer engine life. Generally, it is difficult to save money in the long run, due to the cost of the conversion kit.