I came in late on this thread and now I'm pretty concerned. I put
Castrol GTX "start Up" oil 5W-20 in my newly rebuilt 29E engine. I have
about one-half hour running time on it now. I read the bottle label and
it said nothing about ZDDP. So what oil can I buy that DOES contain the
right amount of ZDDP?? Is this stuff available as a separate additive??
I've seen too many responses from knowledgeable Healey engine gurus to
believe this ZDDP talk is just a bunch of BS. I'm sorta overwhelmed
about it right now.
Jack
-----Original Message-----
From: owner-healeys@Autox.Team.Net [mailto:owner-healeys@Autox.Team.Net]
On Behalf Of Dave & M
Sent: Sunday, May 13, 2007 7:58 PM
To: John Soderling
Cc: Healey List
Subject: Re: Confused - ZDDP and our oils
Hi John,
I'm as confused as anyone.
The listed results are quite old, considering that oil content &
published numbers are changing very rapidly.
the published numbers that you quote which are quite high, certainly
enough to do the job. It's my belief that any oil that actually meets
API service SM for 2007 will of necessity have it's ZDDP content
significantly reduced from this level.
If I'm wrong, it has only cost me a few bottles of EOS. If right, a
new cam & lifters have been saved. I doubt if we will ever get a
straight answer from the oil companies. They MUST cater to the
majority of customers. The folks with flat tappet cams who might be
affected by the newest oils are an insignificant percentage of their
whole customer base. I believe the manufacturers started using roller
tappet cams which don't require the high ZDDP levels in the mid
1980's. Not many older cars are on the road.
I note that the small specialty sellers of oil for race & off road use
are not hesitant to publish right up front what the ZDDP content of
their oils are.
I think each of us will have to make a decision & hope for the best.
Regards,
Dave Russell
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