Sending unit ground strap on stainless

Can't trust the gas gauge in most vehicles anyways. What I did was starting with an empty tank, write down what the gauge reads. Add 2 gallons, write down what the gauge reads. Repeat about 7 more times, each time stopping to write down how many gallons are in the tank, and what the gauge reads. Now you have a pretty good reference for gallons vs gauge.

But I still just take the worst MPG I have seen and keep track of mileage. I get to about 120 miles on a full tank, I know I better fill it up pretty soon.