OK got some new info and the results are ... it's the dash gauge and Rocketman is the recommended vendor for recalibration. I did put the Spectra FG 86B in the car Oct. 10, 2019 at 20,280 miles. Kept a record of gas fill ups, ohm readings and mileage. End result was with the gas gauge needle dead on E I got a 65 ohm reading. I still had about 5 gallons of gas in the tank. Bill Basore at Desert Classic Parts refurbished my C9WE-9275-A Sender. I installed it yesterday, at 22,325 miles, with much the same results. With an empty tank and the needle below E I got a 66 ohm reading. With 3 gallons in the tank I got a 53 ohm reading and with 20 gallons, at $6.70 a gallon, I got a 10 ohm reading. I called Basore, relayed my findings and he confirmed the dash gauge was the problem. Basore took a bit more time to explain the why and how but that's the short story. When I pulled the Spectra unit the float had an eyedropper of gas in it. Other than that the Spectra sender did a good job. Because I am not taking my dash apart to get the gauge out, right away, I will live with Empty means 3 gallons of gas in the tank. Close enough. Brian