[Mgs] ZDDP again / STP

[Brian Boss]

This isn't a reason not to use STP, per se, but I think GM's EOS is a better product for raising ZDDP levels. It was designed and marketed as a break in additive but a lot of car enthusiasts use it at every change in older, flat tappet motors.
   
  This is what I will be using when my stash of SL rated Valvoline is gone.
   
  Here is a good article on oils:
  http://www.lnengineering.com/oil.html
   
  The author is primarily addressing Porsche motors but don't hold that against him ;)
   
  --------------------------------------------------------------------
  Date: Sun, 2 Sep 2007 00:28:10 -0400
From: "Bob Donahue" <bobmgtd at insightbb.com>
Subject: Re: [Mgs] ZDDP again / STP
To: "mgs" <mgs at autox.team.net>
Message-ID: <002d01c7ed19$ab5a0fc0$6600a8c0 at yourmb2swywknr>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
 reply-type=original

Works for me. Does anyone have a reason not to use STP in an MG?

Bob Donahue (Still Stuck in the '50s)
Email - bobmgtd at insightbb.com
Cars:       52 MGTD - #17639
               71 MGB - #GHN5UB254361
Member:  NEMGTR #11470
               NAMGBR # 7-3336
               Hoosier MGB Club
               Olde Octagons of Indiana

----- Original Message ----- 
From: "Larry Daniels" <ladaniels at sbcglobal.net>
To: "Bob Donahue" <bobmgtd at insightbb.com>; "MGs" <mgs at autox.team.net>; 
"Spridgets" <Spridgets at autox.team.net>; <spitfires at autox.team.net>
Sent: Sunday, August 26, 2007 11:10 PM
Subject: Re: [Mgs] ZDDP again


>
> ----- Original Message ----- 
> From: "Bob Donahue" <bobmgtd at insightbb.com>
>
> This product sounds interesting.
>
> BTW, STP is supposed to have ZDDP in it. Does it have enough to make
 up 
> for
> what the EPA is taking out?
>
> Bob Donahue (Still Stuck in the '50s)
> ====================================
>
> Bob, I don't have any ppm numbers for you, but this is what STP told
 me:
>
>
>
> I emailed STP from their website regarding the two oil additives and
 their
> relative amount of ZDDP.  Here is their response:
>
>
> Dear Mr. Daniels,
>
> Thank you for contacting us about STP Oil Treatment. We always
 appreciate
> hearing from our consumers.
>
> The STP 4 Cylinder Oil Treatment contains only slightly more than the
 STP
> Oil Treatment.  They both contain about 4 times the amount of ZDDP as
 what
> motor oils once contained.  The product was originally designed for
 flat
> tappet cam motors.  We have many classic car owners that use our
 product 
> for
> this reason.
>
> Again, thank you for contacting us.
>
>
> Sincerely,
>
> Patti Copper