<div dir="ltr">I'll confess that I haven't been out to buy oil for about a year. I went out this morning to a couple of nearby stores, and sure enough, they had Valvoline VR1 and a couple other brands that were clearly labeled "High Zinc" or mentioned ZDDP on the label. It looks like a lot of oil companies are taking the old car/classics/hot rod market seriously. Valvoline conventional was the least expensive, at under $7.00/qt.<div><br></div><div>As a side note, I've been using conventional oil because my experience with old seals and synthetic oil hasn't been good. An oil company rep told me that in their experience, synthetics have an improved detergent effect that points up wear in old seals that's been masked by a buildup of contaminants. It's a theory...<br><div><br></div><div>Back to some of the earlier discussions...Correct me if I'm wrong, but Castrol seems to be the least forthcoming about ZDDP levels in their oils - I wasn't able to find a table specifying zinc in ppm for GTX. Rimmer Bros. in the UK sells something that looks like a Castrol for old cars, but I didn't see that available here. Not knowing, would you want to add ZDDP? I don't know.</div><div><br></div><div>For an MGB with a catalyst, I'd probably think about using an oil with a known amount of ZDDP (ppm). Some oil companies publish this level. I've seen between 600 ppm and 1200 ppm. It's sort of a crap shoot with a bottle of additive, given that you might not know the concentration.</div><div><br></div><div><br></div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Jul 7, 2019 at 7:08 AM Charley Robinson <<a href="mailto:Charley38@twc.com">Charley38@twc.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div bgcolor="#FFFFFF">
Maybe you haven't looked hard enough. I bought two quarts of 20W50
VR1 yesterday at my local Autozone. The other local stores carry it
too. The first bullet on the back label calls it "High
Performance/Racing Oil". Here's a blurb from Valvoline's website: <a href="https://sharena21.springcm.com/Public/Document/18452/18bdee61-0a7e-e711-9c10-ac162d889bd3/a61538b4-0cbd-e711-9c12-ac162d889bd1" target="_blank">https://sharena21.springcm.com/Public/Document/18452/18bdee61-0a7e-e711-9c10-ac162d889bd3/a61538b4-0cbd-e711-9c12-ac162d889bd1</a><br>
<br>
I've been using 20W50 VR1 in my '69 MGB for the last 5 years or
so. I use synthetics in my newer cars.<br>
<br>
CR<br>
<br>
<br>
<div class="gmail-m_-4215837252036478448moz-cite-prefix">On 7/6/2019 10:01 PM, Chris Attias
wrote:<br>
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<blockquote type="cite">
<div dir="ltr">I don't claim exhaustive knowledge about all racing
oils. Valvoline VR1 is primarily made for racing, and I'd call
it a specialty oil. Not something I've seen on the shelves at
local auto parts stores. <br>
<div><br>
</div>
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<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Sat, Jul 6, 2019 at 6:40 PM
Charley Robinson <<a href="mailto:Charley38@twc.com" target="_blank">Charley38@twc.com</a>> wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div bgcolor="#FFFFFF"> Sorry, I don't agree unless you see
Valvoline as a specialty motor oil supplier.<br>
<br>
CR<br>
<br>
<div class="gmail-m_-4215837252036478448gmail-m_7183647943737747142moz-cite-prefix">On
7/6/2019 10:28 AM, Chris Attias wrote:<br>
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<div dir="ltr"><br>
<div>As classifications change, old oil formulations
become obsolete, the appropriate oil for flat tappet
engines has become pretty much the product of
specialty oil companies like Royal Purple, Driven/Joe
Gibbs, Red Line, Lucas, and Collectors Choice (Moss).<br>
</div>
<div><br>
</div>
Chris
<div><br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Fri, Jul 5,
2019 at 10:32 PM Charley Robinson via Mgs <<a href="mailto:mgs@autox.team.net" target="_blank">mgs@autox.team.net</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div bgcolor="#FFFFFF"> I've been reading up on it
to refresh my memory. A lot of folks just take
other peoples' word for it.<br>
<br>
CR<br>
<br>
<div class="gmail-m_-4215837252036478448gmail-m_7183647943737747142gmail-m_-7918293755375773193moz-cite-prefix">On
7/5/2019 9:02 PM, Max Heim via Mgs wrote:<br>
</div>
<blockquote type="cite"> Only certain weights.
You have to read the labels, or usually the
spec sheets.
<div><br>
<div>
<div>--</div>
<div>Max Heim</div>
<div><a href="mailto:mvheim@sonic.net" target="_blank">mvheim@sonic.net</a></div>
<div><br>
</div>
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<div>On Jul 5, 2019, at 6:15 PM, FrankK
<<a href="mailto:frankk12@verizon.net" target="_blank">frankk12@verizon.net</a>>
wrote:</div>
<br class="gmail-m_-4215837252036478448gmail-m_7183647943737747142gmail-m_-7918293755375773193Apple-interchange-newline">
<div>
<div dir="ltr">
<div dir="ltr">
<div style="font-size:12pt;font-family:Calibri">
<div>I assume all those brands
include the correct ZDDP
proportions./ </div>
<div style="font-size:small;text-decoration:none;font-family:Calibri;font-weight:normal;font-style:normal;display:inline">
<div style="font:10pt tahoma">
<div> </div>
<div style="background:rgb(245,245,245)">
<div><b>From:</b> <a title="mvheim@sonic.net">Max
Heim</a> </div>
<div><b>Sent:</b> Friday,
July 5, 2019 9:02 PM</div>
<div><b>To:</b> <a title="frankk12@verizon.net">FrankK</a>
; <a title="mgs@autox.team.net">MG
List</a> </div>
<div><b>Subject:</b> Re:
[Mgs] Oil Additive</div>
</div>
</div>
<div> </div>
</div>
<div style="font-size:small;text-decoration:none;font-family:Calibri;font-weight:normal;font-style:normal;display:inline">Right,
but there are other brands. I
use Mobil1 15W50. Others use
Royal Purple, Joe Gibbs,
Kendall or AMSoil brands.
<div> </div>
<div>
<div> </div>
<div>
<div>--</div>
<div>Max Heim</div>
<div><a>mvheim@sonic.net</a></div>
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<div dir="ltr"><font face="comic sans ms, sans-serif">___</font></div>
<div dir="ltr"><br>
</div>
<div dir="ltr"><font face="comic sans ms, sans-serif">Chris
Attias</font>
<div><font face="comic sans ms, sans-serif">8117 Azalea
Dr.</font></div>
<div><font face="comic sans ms, sans-serif">Felton, CA
95018</font></div>
<div><font face="comic sans ms, sans-serif">home:
831.335.2275</font></div>
<div><font face="comic sans ms, sans-serif">cell:
831.247.0001</font></div>
</div>
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<br>
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</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><font face="comic sans ms, sans-serif">___</font></div><div dir="ltr"><br></div><div dir="ltr"><font face="comic sans ms, sans-serif">Chris Attias</font><div><font face="comic sans ms, sans-serif">8117 Azalea Dr.</font></div><div><font face="comic sans ms, sans-serif">Felton, CA 95018</font></div><div><font face="comic sans ms, sans-serif">home: 831.335.2275</font></div><div><font face="comic sans ms, sans-serif">cell: 831.247.0001</font></div></div></div></div></div></div>