On Mon, 28 Mar 2005, Bill Putney wrote:

> > Don't believe I've seen one of the 15 (or 5) minute "fast flush"
> engine > enemas with the Rislone label on it...
>
> In the "old days", that's what a Rislone flush was -

As far back as I have seen it advertised (at least as far back as the mid
'60s), it's always been the same as it is now: A thin oil containing a
dose of detergent chemistry. The fast-flush gookums are made out of active
solvents and/or Butyl Cellosolve.