my Autometer in-dash wideband reads 1/2 number leaner than my BS3 wideband; BS3 says 14.7, A/M says 15.2:1. I have not verified it with my handheld.............
It could be that one bank is half a point richer/leaner than the other on my engine combo (possible, but I've never experienced it off that amount before), or else the BS3 or it are not accurate.
Jody