<html><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Michael,<div class=""><br class=""></div><div class="">I use 20w-50 in all of my classic car engines. Now, if I drove them in the winter time I would probably consider the 10w-40 option as it would have the lower 10W viscosity for those cold morning start ups. So you are fine. </div><div class=""><br class=""></div><div class="">Richard</div><div class=""><br class=""></div><div class=""><br class=""><div class="">
<div>Richard Mayor</div><div><a href="mailto:boyracer466@gmail.com" class="">boyracer466@gmail.com</a></div><div class=""><br class=""></div><br class="Apple-interchange-newline">
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<div><br class=""><blockquote type="cite" class=""><div class="">On Mar 20, 2022, at 1:50 PM, Michael Salter via Healeys <<a href="mailto:healeys@autox.team.net" class="">healeys@autox.team.net</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><meta charset="UTF-8" class=""><div dir="auto" style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class="">IMHO Michael that will be absolutely no problem. <div dir="auto" class=""><br class=""></div><div dir="auto" class="">M</div></div><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><div class="gmail_quote" style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><div dir="ltr" class="gmail_attr">On Sun., Mar. 20, 2022, 4:45 p.m. Michael Oritt via Healeys, <<a href="mailto:healeys@autox.team.net" class="">healeys@autox.team.net</a>> wrote:<br class=""></div><blockquote class="gmail_quote" style="margin: 0px 0px 0px 0.8ex; border-left-width: 1px; border-left-style: solid; border-left-color: rgb(204, 204, 204); padding-left: 1ex;"><div dir="ltr" class=""><div class="gmail_default" style="color: rgb(51, 51, 255);">Through a stupid mistake on my part today I purchased eight quarts of 20w50 synthetic Amsoil rather than the 10w40 I normally use year-round. Unfortunately I discovered this mistake this afternoon only after I completed the oil/filter change.</div><div class="gmail_default" style="color: rgb(51, 51, 255);"><br class=""></div><div class="gmail_default" style="color: rgb(51, 51, 255);">I am concerned that this higher-viscosity oil might in some way damage my engine. It has been about 60-70K miles from the engine's having been professionally rebuilt and while oil pressure has fallen somewhat over the last several years the gauge still indicates about 40 psi at 2500-3K rpm's and about 20 psi at fast idle with 10w40, in both cases with hot oil and at normal engine operating temperature. I took the car for a very short spin after completing the change and I am quite sure I did not did not get the oil up to full operating temperatures but in any case the OP did seem a few psi higher than what I am used to seeing</div><div class="gmail_default" style="color: rgb(51, 51, 255);"><br class=""></div><div class="gmail_default" style="color: rgb(51, 51, 255);">At this point I have about $125.00 invested in the mistake: seven quarts and a new K&N filter. If my fear is verified by your opinions I am certainly willing to drain and refill--I certainly do not want to be driving around if there is a real risk of causing damage. </div><div class="gmail_default" style="color: rgb(51, 51, 255);"><br class=""></div><div class="gmail_default" style="color: rgb(51, 51, 255);">I eagerly await the group wisdom.</div><div class="gmail_default" style="color: rgb(51, 51, 255);"><br class=""></div><div class="gmail_default" style="color: rgb(51, 51, 255);">Best--Michael Oritt</div><div class="gmail_default" style="color: rgb(51, 51, 255);"><br class=""></div></div>_______________________________________________<br class="">Support <a href="http://Team.Net" class="">Team.Net</a><span class="Apple-converted-space"> </span><a href="http://www.team.net/donate.html" rel="noreferrer noreferrer" target="_blank" class="">http://www.team.net/donate.html</a><br class="">Suggested annual donation $12.75<br class=""><br class="">Archive:<span class="Apple-converted-space"> </span><a href="http://www.team.net/pipermail/healeys" rel="noreferrer noreferrer" target="_blank" class="">http://www.team.net/pipermail/healeys</a><span class="Apple-converted-space"> </span><a href="http://autox.team.net/archive/healeys" rel="noreferrer noreferrer" target="_blank" class="">http://autox.team.net/archive/healeys</a><br class=""><br class=""><a href="mailto:Healeys@autox.team.net" target="_blank" rel="noreferrer" class="">Healeys@autox.team.net</a><br class=""><a href="http://autox.team.net/mailman/listinfo/healeys" rel="noreferrer noreferrer" target="_blank" class="">http://autox.team.net/mailman/listinfo/healeys</a><br class=""><br class="">Unsubscribe/Manage:<span class="Apple-converted-space"> </span><a href="http://autox.team.net/mailman/options/healeys/michaelsalter@gmail.com" rel="noreferrer noreferrer" target="_blank" class="">http://autox.team.net/mailman/options/healeys/michaelsalter@gmail.com</a><br class=""><br class=""></blockquote></div><span style="caret-color: rgb(0, 0, 0); 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