Another fuel economy question here. Anyone familiar with Lean Cruise? I was able to get it to enabled on my 2005 2500hd 6.0 and it’s working except I lost cruise control but I knew that was probably going to happen. I copied the settings from a Holden bin. I was seeing commanded afr at a hair above 17. I don’t have a wideband to monitor this at the moment. I can only monitor what it’s commanding. My question is what is a safe afr to run lean cruise at? I have seen so many different answers online.