<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div class="">I agree with Charley… I did that for a while but it was inconvenient, and once I found a proper oil it was pointless.</div><div class=""><br class=""></div><div class="">Consider, if you have to top off your oil by adding a quart between changes (as is common), are you also adding the exact proportional amount of your additive? It’s just impractical to deal with on a regular basis. There is nothing magical about Castrol 20W50.</div><div class=""><br class=""></div><div class="">
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<br class=""><div><blockquote type="cite" class=""><div class="">On Jul 5, 2019, at 3:26 PM, Charley Robinson via Mgs <<a href="mailto:mgs@autox.team.net" class="">mgs@autox.team.net</a>> wrote:</div><br class="Apple-interchange-newline"><div class="">
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Why raise your cost by adding an additive when there are oils that
already have the zinc? I use VR1; all the local auto parts stores
have it.<br class="">
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CR<br class="">
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<div class="moz-cite-prefix">On 7/5/2019 10:50 AM, FrankK via Mgs
wrote:<br class="">
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<div class="">There was a great deal of discussion here regarding the
use of different oil to compensate for the lack of ZDDP in
oil these days. I didn’t see anyone include a discussion of
the practice of adding ZDDP to oil that is lacking in it.
There are several sources where it is available and I have
availed myself of it and added it to my Castrol 20-50 when
I change the oil in my 80 MGBLE. </div>
<div class="">Is there a problem in doing this in lieu of using
Valvoline Racing Oil say? </div>
<div class="">Frank Krajewski</div></div></div></blockquote></div></div></blockquote></div></body></html>