Oh trust me. I want LPG fumigation. Sadly it's on the bottom of my list. The cost of a dual-stage regulator, tank, filling, (Safely) mounting the tank, pressure/LPG proof lines is way out of my budget for the time being. It's been shown not to have as much effect on IDI engines as it does with DI engines. http://www.mrsharkey.com/lpg.htm Once I got to the point that I need to squeeze every little HP out of the engine without changing the pump plungers, then I will look more into it.

It also has the most damage risk to the engine if not tuned right. Not a good risk on my only car.