could bad gas cause this?

[spools420a]

Great now I'm second guessing myself,It seems I cant go off the ground strap on the spark plug for a/f ratios theory says thats for telling spark plug heat range and timing indicator.....

Reading Spark Plugs Correctly

Spark plug reading

^^ ^^
So if this is the real way to read a plug then my car is actually running rich because of the black soot on the base ring (the jetting)and porcelan is a light brownish.

If this is the case then where did the white shit come from on the ground strap? I'm thinking the massive 0.40" + ish gap was turning the tip white like that but I'm still gonna double check some stuff and ditch that crappy old gas before I drive it.This whole time Ive been investigating a lean condition and according to the internet I was wrong all along =/ fck me...