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As far as I know SG is the highest rating suitable for most classic cars
incl. AH's. They have supposedly the minimum safe zinc content.
Kees Oudesluijs
Bluehealey schreef op 19-6-2015 om 9:04:
> Spot on Bill.
> Both technically and philosophically.
>
> Alan - from my iPad
>
> On 19 Jun 2015, at 00:58, WILLIAM B LAWRENCE <ynotink@msn.com
>
>>
>>
>> ------------------------------------------------------------------------
>> Subject: RE: [Healeys] Oil again
>> Date: Thu, 18 Jun 2015 03:08:45 +0000
>>
>> I see I'm late to the party on this topic. I was up in the Rocky
>> Mountains participating in the Glenwood Springs Rallye when it
>> started and frankly I wish I still were. However, at the risk of
>> being called ignorant, uninformed, commie pinko or whatever I have a
>> little information that may be of help in sorting out the oil confusion.
>>
>> Engine oil comes in generations as defined by the additive packages
>> which are blended in to tailor them for specific purposes. These
>> generations can be traced by the API codes which are located on the
>> container.
>>
>> The API code is two letters found on the label. The first letter is
>> either a C, which denotes the oil is intended for use in a
>> compression ignition engine, or an S which denotes it is intended for
>> use in a spark ignition engine.
>>
>> The second letter denotes the type of use intended and follows the
>> development of the internal combustion engine from the most primitive
>> (A) to the most sophisticated (I think they are at O Now). protective
>> amounts of zinc were dropped from the additive package at SM. Any oil
>> before that, or say from SD through SL, still contains zinc.
>>
>> It may be true that zinc is not necessary for engines after the
>> camshaft break-in, but I prefer to be cautious on that score so I
>> look for oil that is SL or earlier. I'll let the more informed and
>> adventurous members conduct that experiment...
>>
>> Some heavy duty oils such as Chevron Delo or Rotella are rated for
>> both compression ignition and for spark ignition service and will
>> show both a C and an S rating. In some cases those oils will still
>> have an SM or later rating.
>>
>> The one oil type I have found that is reliably rated below SM is four
>> stroke motorcycle oil because motorcycles don't have catalysts.
>> Typically it is rated SF or SG. Since the oil has no way of knowing
>> it is being run in an automotive engine and my Healey doesn't know
>> the oil it's spewing is meant for a motorcycle I have been running
>> Castrol 4T in 20W-50 grade quite happily.
>>
>> As for the controversy part, if we start banning contentious topics
>> we soon won't have anything to talk about like most modern college
>> campuses.
>>
>> Bill Lawrence
>> BN1 #554
>>
>> ------------------------------------------------------------------------
>> Date: Sat, 13 Jun 2015 06:14:11 -0400
>> Subject: Re: [Healeys] Oil again
>>
>> We ALWAYS talk about oil and no one seems to have the answer, so we
>> simply keep talking about it.
>> For a change let's talk about politics or religion, two topics which
>> are susceptible to absolute rectitude. Many or most of us do not have
>> the correct answers on either and someone here--perhaps an unknown
>> lurker--may choose to now come forward with his or her enlightenment
>> and reveal it to us.
>>
>> To mix a metaphor, I now listen with a jaundiced eye.
>>
>> Best--Michael Oritt
>>
>> On Fri, Jun 12, 2015 at 7:45 PM, John Vrugtman <javrugtman@htcnet.org
>>
>> politics and religion, like water and oil, don't mix. On the
>> other hand, oil and Healeys mix very well.
>> JAV
>>
>> On 6/12/2015 7:16 PM, Richard Kahn wrote:
>>
>> I think topics like politics, religion, and oil should be
>> taboo. There is no best in any of these topics.
>> Rich Kahn
>>
>>
>>
>>
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<div class="moz-cite-prefix">As far as I know SG is the highest
rating suitable for most classic cars incl. AH's. They have
supposedly the minimum safe zinc content.<br>
Kees Oudesluijs<br>
<br>
<br>
<br>
Bluehealey schreef op 19-6-2015 om 9:04:<br>
</div>
<blockquote
cite="mid:98B782A6-7AD6-4756-A678-E1D71C0523D1@gmail.com"
type="cite">
<meta http-equiv="Context-Type" content="text/html; charset=utf-8">
<div>Spot on Bill.</div>
<div>Both technically and philosophically. <br>
<br>
Alan - from my iPad</div>
<div><br>
On 19 Jun 2015, at 00:58, WILLIAM B LAWRENCE <<a
moz-do-not-send="true"
href="mailto:ynotink@msn.com";>ynotink@msn.com</a>>
wrote:<br>
<br>
</div>
<blockquote type="cite">
<div>
<div dir="ltr"><br>
<br>
<div>
<hr id="stopSpelling">From: <a moz-do-not-send="true"
href="mailto:ynotink@msn.com";>ynotink@msn.com</a><br>
To: <a moz-do-not-send="true"
href="mailto:michael.oritt@gmail.com";>michael.oritt@gmail.com</a><br>
Subject: RE: [Healeys] Oil again<br>
Date: Thu, 18 Jun 2015 03:08:45 +0000<br>
<br>
<div dir="ltr">I see I'm late to the party on this topic.
I was up in the Rocky Mountains participating in the
Glenwood Springs Rallye when it started and frankly I
wish I still were. However, at the risk of being called
ignorant, uninformed, commie pinko or whatever I have a
little information that may be of help in sorting out
the oil confusion.
<div><br>
</div>
<div>Engine oil comes in generations as defined by the
additive packages which are blended in to tailor them
for specific purposes. These generations can be traced
by the API codes which are located on the container. </div>
<div><br>
</div>
<div>The API code is two letters found on the label. <span>The
first letter is either a C, which denotes the oil is
intended for use in a compression ignition engine,
or an S which denotes it is intended for use in a
spark ignition engine.</span></div>
<div><br>
</div>
<div>The second letter denotes the type of use intended
and follows the development of the internal combustion
engine from the most primitive (A) to the most
sophisticated (I think they are at O Now). protective
amounts of zinc were dropped from the additive package
at SM. Any oil before that, or say from SD through SL,
still contains zinc.</div>
<div><br>
</div>
<div>It may be true that zinc is not necessary for
engines after the camshaft break-in, but I prefer to
be cautious on that score so I look for oil that is SL
or earlier. I'll let the more informed and adventurous
members conduct that experiment...</div>
<div><br>
</div>
<div>Some heavy duty oils such as Chevron Delo or
Rotella are rated for both compression ignition and
for spark ignition service and will show both a C and
an S rating. In some cases those oils will still have
an SM or later rating.</div>
<div><br>
</div>
<div>The one oil type I have found that is reliably
rated below SM is four stroke motorcycle oil because
motorcycles don't have catalysts. Typically it is
rated SF or SG. <span>Since the oil has no way of
knowing it is being run in an automotive engine and
my Healey doesn't know the oil it's spewing is meant
for a motorcycle I have been running Castrol 4T in
20W-50 grade quite happily.</span></div>
<div><br>
</div>
<div>As for the controversy part, if we start banning
contentious topics we soon won't have anything to talk
about like most modern college campuses.</div>
<div><br>
</div>
<div>Bill Lawrence</div>
<div>BN1 #554<br>
<br>
<div>
<hr id="ecxstopSpelling">From: <a
moz-do-not-send="true"
href="mailto:michael.oritt@gmail.com";>michael.oritt@gmail.com</a><br>
Date: Sat, 13 Jun 2015 06:14:11 -0400<br>
To: <a moz-do-not-send="true"
href="mailto:javrugtman@htcnet.org";>javrugtman@htcnet.org</a><br>
CC: <a moz-do-not-send="true"
href="mailto:healeys@autox.team.net";>healeys@autox.team.net</a><br>
Subject: Re: [Healeys] Oil again<br>
<br>
<div dir="ltr">
<div class="ecxgmail_default">We ALWAYS talk about
oil and no one seems to have the answer, so we
simply keep talking about it. </div>
<div class="ecxgmail_default">For a change let's
talk about politics or religion, two topics
which are susceptible to absolute rectitude.
Many or most of us do not have the correct
answers on either and someone here--perhaps an
unknown lurker--may choose to now come forward
with his or her enlightenment and reveal it to
us. <br>
</div>
<div class="ecxgmail_default"><br>
</div>
<div class="ecxgmail_default">To mix a metaphor, I
now listen with a jaundiced eye.</div>
<div class="ecxgmail_default"><br>
</div>
<div class="ecxgmail_default">Best--Michael Oritt </div>
</div>
<div class="ecxgmail_extra"><br>
<div class="ecxgmail_quote">On Fri, Jun 12, 2015
at 7:45 PM, John Vrugtman <span dir="ltr"><<a
moz-do-not-send="true"
href="mailto:javrugtman@htcnet.org";
target="_blank">javrugtman@htcnet.org</a>></span>
wrote:<br>
<blockquote class="ecxgmail_quote">
<div> politics and religion, like water and
oil, don't mix. On the other hand, oil and
Healeys mix very well.<br>
JAV<span><br>
<br>
<div>On 6/12/2015 7:16 PM, Richard Kahn
wrote:<br>
</div>
<blockquote>
<div dir="ltr">I think topics like
politics, religion, and oil should be
taboo. There is no best in any of
these topics.<br>
Rich Kahn<br>
</div>
<br>
<fieldset></fieldset>
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