Mainly because it appears the requirement to reduce zinc and (mainly)
phosphorous doesn't apply to 20W-50 (arguably the best oil for a Big
Healey). Inertia being what it is, I doubt too many companies would
bother to reformulate any oil they don't have to (unless it's to meet
new SAE requirements; SL, SM, etc.).
AFAIK, no one was required to add ZDDP in the first place. At first it
was a competitive advantage, but was added by most brands eventually.
Zinc and phosphorous were never reported on the bottle before (though it
might have said something like "improved wear resistance"). That's
changed, at least with VR1.
Note I don't profess to be an expert, but I have done a bit of research
trying to understand the problem. I recall reading that all ZDDP is
made by just one company--at some point that business model may not be
viable.
Bob
Robert Blair wrote:
Bob, Why just believe - what does the can label say?
Robert N. Blair Yellow 65BJ8 rnbmail@yahoo.com
--
*******************************************************************
Bob Spidell San Jose, CA bspidell@comcast.net
*******************************************************************
_______________________________________________
Support Team.Net http://www.team.net/donate.html
Healeys@autox.team.net
http://autox.team.net/mailman/listinfo/healeys
http://www.team.net/archive
|