Fuel gauge problem

My theory is the repop senders are “relatively” consistent. Production tolerances should be good enough. I am not aiming for perfection. I figure that if I am within a gallon or two, that is good enough. I got the values off a chart made by Dana67dart if I remember correctly.

The proper way would probably be to drain the tank and add gas, but that is a real pain in the butt on many levels, so I took the lazy man’s way out.

I run the car to a half tank and then put gas in it and see if it takes a half tank, forgot exactly what that is as it has been a few years, but it was within about a gallon or so at different fill levels I tried.