[slantsixness]

Ok, this is a strech but,

About 4 years ago,I used slick50 gas treatment in my '96 grand Voyager and a 90 daytona. Both fuel guages starting acting up in the same way. the odd thing was on the voyager, the guage read half full and the fuel light and annoying Bong came on. The daytona just read full until it had gone about 10 miles and then read empty and the bong and light came on. After I used the tankfull of gas,I took the sender out of the daytona and wiped a greasy sh1tty stuff off the sending unit resistor, and all is still working well, but I won't put that sh1t in another car, ever.
The Voyager was cured after 2 tankfulls of gas, without removing the sending unit (the tank in the Van's a pain in the ass to remove!)
Suprisingly enough, I usually warn people away from using sh1t like the slick50 stuff anyway, but not this time...

Take this for what it's worth, but that's what I saw with my own two eyes. Both car and van sending units and pumps are still ok.