[Diesel_Dave]

The tricky thing about a diesel is that to get fuel flow accurately, you need to get it directly from the ECM. In gas vehicles, they almost always have either a MAF or a MAP sensor reading that gets broadcast, either of which can do a reasonable job at predicting fuel flow (because gas engine almost all run at a constant air-fuel ratio). The problem that I ran into with my truck is that, while the ECM does have fuel flow information Cummins/Dodge decided not not broadcast this info so that it's available over the ODB connection, hence it's not available to me.

For what I can tell, the product is geared towards larger vehicles (like RV's, semis, etc.) that typically don't have OBDII connections, but rather J1939 & J1708 connections. Looks like they did add some things from the basic Scangauge, but it looks to me like the main change is the communication protocol & the connectors.

The issue still is that you can't read what's not there. If fuel flow isn't broadcast, you won't be able to get it. The same with EGT's or tranny temps.

P.S. I'm still bitter about not being able to read fuel flow over my OBD port.