Thanks, I appeciate your post. I agree, “dual-fuel” complicates the picture quite a lot, because you’d have to have two radically different fuel delivery systems. To my knowledge, it’s not exceptionally difficult (nor costly) to convert a 100% gas to 100% CNG, but the ability to switch back and forth, I would imagine, could be fairly complex. I’d imagine it’s not made any simpler at all that most cars now utilize fuel injection vs carbueration. Would you agree?
Yes, I agree completely.
The dual fuel approach is complex and costly.
There are (or were) several companies that specialized in doing conversions of small block V8’s to run on CNG. These engines really ran quite well, and are found running on “stove” quality CNG in all sorts of applications that were exempt from emissions standards.