Those are the same results you get by using Motor Flush.
Gunk / Siloo / Berrymans / Siloo and several others make motor flush.
I like Siloo.
I'd say it's a good practice if you buy an old car and you need to make a
good evaluatition on what you've bought.
Running the motor flush on an old dirty engine could bring it back or send
it to the junk yard.
Used properly it doesn't harm anything but it will open up the oil leaks and
can cause engines to smoke if it removed the crud around the valve guides
and piston rings.

Stan Wilder
Engine Ceramics
214-352-4931
www.engineceramics.com
----- Original Message -----
From: "George Goff" <THX0001@AOL.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Monday, November 21, 2005 6:30 AM
Subject: Re: Kerosene to clean out engine before oil change

> In a message dated 11/21/05 1:38:57 AM, eduntz@HOTMAIL.COM writes:
>
> << Does anyone here add kerosene before an oil change to clean it out? >>
>
> Ed,
>
> I don't have to, but I witnessed my uncle, the original motorhead "Wild
Bill"
> Worthington, use it to great effect.  Once, Wild Bill could no longer
stand
> my old man's abuse of a fine automobile so he took it upon himself to
change
> the oil in an Olds 98 which probably hadn't seen an oil change in 30 Kmi.
or, in
> other words, since it was driven off the showroom floor.  He mixed a 50/50
> solution of kerosene and motor oil, filled the crankcase and let the Olds
idle.
> After a few minutes, the Olds started to puff billows of smoke and I got
> scared because I thought my ass was grass since I was part and parcel to
this
> debacle.  Wild Bill told me to cool my tool and that everything was as it
should
> be.  After about twenty minutes the smoking stopped, the hydraulic valves
> quieted and the Olds purred.  When it was drained, the once fresh
oil/kerosene mix
> poured out of the oil pan looking like India ink.
>
> George