My concern for APGI is their website. For me, it is a little too non-technical. Show us a schematic of their gas train, or at least a picture of an installation or application, both vehicular and stationary. Everyone has access to the web and pictures equate into thousands of words (and dollars!)
The promise of diesel and natural gas mixing IS huge, and IS happening with very real cost savings. Diesel prices are not going down as the diesel market is global, and prices accordingly. APGI may (will) be one of several successful businesses involved in this transformative process, but in my opinion, they need to sell it a lot better.