Your post really has nothing to do with Techron.

Odds are you got water in your gas. Happened to me as well.

Owner of station was combative, and claimed that this was "impossible", and yet there was the water. I didn't even want anything from her, just thought they would like to know there was a problem.

I pumped out the tank, then drained the residual. Then I let the water settle out, and poured the gas off the top for reuse.

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1986 300E 5-Speed 240k mi.