The water-injection system for your carburetor that the oil companies don't want...

fho · 2026-09-13T20:10:46

Joke's (partly) on you: https://en.wikipedia.org/wiki/Water_injection_(engine)

mikestew · 2026-09-13T20:20:10

Oh, it's been proven to work, even in a limited number of production vehicles. Just not with what you buy out of the back of a magazine. :-)

Scoundreller · 2026-09-14T04:07:22

I later in life learned that the “test cards - all channels” ads I saw in the back of the library’s Popular Science in the 90s probably weren’t scams.