'12 now on CNG

[retirednak]

I've grown use to getting hosed on every item bought here in our great state of AK. If I was racking the miles up dragging a RV or trailer again, I'd find a way to fill up at home on the cheap. I'm still fighting the inner self over a new truck & RV, and finally moving to a warming neck of the woods.

 

[DiamondDiver]

Diesel fuel provides a small amount of lubrication to the upper part of the combustion chamber where the top piston ring rides. Zero fuel dilution may indicate that the top ring is not getting enough lubrication. At some point the liner may need to be inspected for excessive wear to determine the proper ratio of CNG / Diesel fuel. The extra wear may be negligible, if lube testing shows additional metallic concentrations an inspection may be warranted.

You may be fine, you probably won't know until you look at the cylinders. I plan on making this mod to my 2012 ram 2500, however, I am aware that there may be an early maintenance penalty with this conversion.

 

[Wingate]

The CNG acts like a programmer that adds a lot of fuel down low. It spools the Turbo instantly on a towing tune. Aggressive tunes just tend make more black smoke down low.
My brother and I have just started experimenting with toggling the CNG with a boost switch.

Are you set up to where the CNG flow stops when you are sitting at a redlight or idling along at light load applications? I have been installing blending systems on large stationary engines for several years and one thing we found during testing is that the blending must be disabled during no load/light load conditions. Blending during those times will put excessive wear on the turbocharger and fuel injectors.
Have you checked the cylinder port temps while blending to see how much rise you are getting with CNG?