As I recall, the main ingrediant in STP was parrifin and it had the bad habit of being extreemly difficult to remove once added to an engine.  I had a friend of mine in high-school add it to his mini-bike and then spent part of the summer having to take the engine apart to scrub out all the STP residue once the performance of the engine took a nosedive.

I always find myself asking, if those additives were so great, wouldn't you see the major oil makers adding them to their oils?

Todd
'88 Westy

 -------------- Original message ----------------------
From: Bob Donalds <donalds1@VERIZON.NET>
> I have a bottle and have done some playing with samples assembly lube and
> such
>  but too many bad memorys of STP
>
> time will tell
> Bob
>
> ----- Original Message -----
> From: "Jack R." <jack007@COMCAST.NET>
> To: <vanagon@GERRY.VANAGON.COM>
> Sent: Thursday, October 04, 2007 6:54 AM
> Subject: Re: 20W-50 oil question
>
>
> > Bob,
> >
> > And what are your thoughts on Lucas Oil Stabilizer?  I've been using Elf
> > 10W50 4 qts, and 1 qt of Lucas... with great results in my 2.1L.  Mann
> > filters of course!
> >
> > Jack R.
> > N. of Detroit
> >
> > -----Original Message-----
> > From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
> > Bob Donalds
> > Sent: Thursday, October 04, 2007 10:18 AM
> > To: vanagon@GERRY.VANAGON.COM
> > Subject: Re: 20W-50 oil question
> >
> > I went to sleep early
> > 20/50 is the right stuff and can be used most of the year here in the
> > north
> > it s not like the top end of the engine is dry when it starts cold so it
> > has
> > lubrication
> >
> > Bob
> >
> >  ----- Original Message -----
> >  From: Jim Akiba
> >  To: Bob Donalds
> >  Sent: Wednesday, October 03, 2007 9:53 PM
> >  Subject: Fwd: 20W-50 oil question
> >
> >
> >  You're being paged on the vanagon list beep beep beep
> >
> >  ---------- Forwarded message ----------
> >  From: David Kao < dtkao0205@yahoo.com>
> >  Date: Oct 4, 2007 12:06 AM
> >  Subject: Re: 20W-50 oil question
> >  To: vanagon@gerry.vanagon.com
> >
> >  Bob, what is your opinion about dino oil 20w-50 most Vanagon people
> >  believe in and kind of insist in using it? They have of course a good
> >  point that the owner's manual suggested it.
> >
> >  My understanding is the 20W part is bad for the first few miles after a
> >  cold start in the morning. That's when the most wear happens to the
> > engine.
> >  But the number of 50 in 20w-50 is good for the rising coolant temperature
> >  when in bumper to bumper traffic. The Vangon's cooling system is unable
> >  to keep the coolant at a constant temperature in slow traffic or in
> > climbing
> >  long hills, unlike my Passat which keeps its coolant temperature at a
> >  constant at all conditions. I can see the benefit of the 50 viscosity
> >  for vanagons. But 20w part is really bad for cold start and first few
> >  miles of driving first thing in the morning.
> >
> >  What's the solution for this? What's your opinion about this? Or it
> > doesn't
> >  matter any way? Thanks a lot.
> >
> >  David
> >
> >
> >
> >
> >
> >
> > ____________________________________________________________________________
> > ________
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