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Oh boy! Another oil thread!<br>
<br>
Now that synthetic is no more expensive than mineral oil, in some
cases cheaper:<br>
<br>
<a class="moz-txt-link-freetext" href="https://www.costco.com/kirkland-signature-5w-30-full-synthetic-motor-oil-5-quart%2c-4-pack.product.100690432.html">https://www.costco.com/kirkland-signature-5w-30-full-synthetic-motor-oil-5-quart%2c-4-pack.product.100690432.html</a><br>
<br>
... I use it in my more modern cars and newer lawn/farm appliances.
The tractors and the '46 Chevy truck get mineral 10W-40, just
because full-syn 10W-40 isn't common and, well, that's what my dad
always put in them. However, until <i>proven</i> otherwise I think
flat-tappet engines need ZDDP (although some claim syns work as good
or better to protect cam lobes--I'm not convinced). From what I've
seen and read, ZDDP is verboten in lower-vis oils, because they're
what's spec'd in newer cars with catalytic converters. Only 20W-50
is claimed to have 'sufficient ZDDP for flat-tappet engines;'
Valvoline VR-1 even says it on the label. A few years ago. VR-1
suddenly disappeared from parts store shelves with no explanation
given, then reappeared a couple years later. I'm no longer able to
buy VR-1 online, but a local Autozone still has some on the shelf so
I stocked up. I think, with 9 filters and enough oil for 9 changes
with top-ups I've got a near-lifetime supply. My guess is California
will ban it outright at some point and, my rule-of-thumb is: "If
California banned/is banning it it must be good" (see: 3M adhesive
remover, Floway, mineral spirits, effective engine
cleaners/degreasers, etc.).<br>
<br>
Bob<br>
<br>
<div class="moz-cite-prefix">On 3/21/2022 7:06 AM,
<a class="moz-txt-link-abbreviated" href="mailto:warthodson@aol.com">warthodson@aol.com</a> wrote:<br>
</div>
<blockquote type="cite"
cite="mid:1823577122.755973.1647871578213@mail.yahoo.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div style="color:black;font: 12pt Comic Sans MS, sans-serif;">This
seems to be a common opinion that unfortunately is not based on
science. I use synthetic oils of the correct viscosity & I
do not experience leaks. A well build engine &
transmission/overdrive do not have to leak. Sealants need to be
applied to clean dry surfaces.
<div>Gary Hodson<br>
<br>
<br>
<div
style="font-family:arial,helvetica;font-size:10pt;color:black"><font
size="2">-----Original Message-----<br>
From: Douglas Barker via Healeys
<a class="moz-txt-link-rfc2396E" href="mailto:healeys@autox.team.net"><healeys@autox.team.net></a><br>
To: Jim Ryan <a class="moz-txt-link-rfc2396E" href="mailto:ryan@jimryan.com"><ryan@jimryan.com></a>; Bob Spidell
<a class="moz-txt-link-rfc2396E" href="mailto:bspidell@comcast.net"><bspidell@comcast.net></a><br>
Cc: <a class="moz-txt-link-abbreviated" href="mailto:healeys@autox.team.net">healeys@autox.team.net</a> <a class="moz-txt-link-rfc2396E" href="mailto:healeys@autox.team.net"><healeys@autox.team.net></a><br>
Sent: Mon, Mar 21, 2022 8:37 am<br>
Subject: Re: [Healeys] Oil grade for 100 Le Mans<br>
<br>
<div id="yiv0454240514">
<div>
<div>In my humble expérience the synthetic always
leasing more</div>
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