[Euro Ford Fan]

Unless you want a pretty light or some numbers just skip them all together. Unless they are a function of a data logging system then they are totally useless. By the time your car runs dangerously lean then it will already have damage before you can get off the throttle. You can't tune off them you need lots of other bits of data before you can correctly adjust a map and if you’re doing that then you already know why they are of little to no use.

I would buy a stick of neon before I bought another AFR gauge.