[Fot] SL-rated oil

[Barr, Scott]

Wow, can it really be 10 years since I bought that oil?  I'd swear I
bought it maybe 3 or 4 years ago, if that long...  Cripes, am I that old
already??

Scott
PS, I bought some fresh stuff when I stopped at the parts place to pick
up the header wrap to keep the new exhaust pipe from setting the trans
blanket on fire...   Will add the Redline ZDDP additive to it and go
racin'.



-----Original Message-----
From: Robert Lang [mailto:lang at isis.mit.edu]
Sent: Friday, June 05, 2009 2:30 PM
To: Barr, Scott
Cc: fot at autox.team.net
Subject: Re: [Fot] SL-rated oil

On Fri, 5 Jun 2009, Barr, Scott wrote:

> I've got half a case of SL-rated Castrol GTX 20w50 on the shelf.  Did
> the oil manufacturers switch to the SM rating at the same time as the
> ZDDP content was dropped?  I.e., what are the chances this oil has the
> proper ZDDP content?

If you want to split hairs, you really want API SG. The reduction
started
then.

But oil that has the SL rating has been sitting "for a while" (like 10
years) and the additives package is most likely not as effective as new
oil would be, e.g. it's not fresh.

> Scott  ( who has some Redline ZDDP additive to drop in just to cover
all
> the bases)

rml
------------------------------------------------------------------------
---
Bob Lang              NER/SCCA                 |  This space for rent
Solo Chair 2008       TR6 40 F Prepared        |  Triumph!
Voice:781-438-2568    FAX: 617-258-9535        |  Cell: 339-927-4489
------------------------------------------------------------------------
---