<div dir="ltr">We've found it necessary to run synthetic gear oil in the endurance TR6. We run 8 and 7 hour races in ChampCar and the gear oil takes a beating. I was a 100% conventional GL4 believer until we melted the poly diff bushings. Synthetic gear oil solved that problem. <div> <br clear="all"><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr">Bob Kramer</div></div></div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Jun 22, 2022 at 11:13 AM Paul Ricco via Fot <<a href="mailto:fot@autox.team.net">fot@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 style="overflow-wrap: break-word;">P.J.<div><br></div><div>I know that a lot of people on FOT have had different experiences with lubricants and there is not one correct answer for all people. So I do not wish to imply that our way is the only way.<br><div><br></div><div>We have been testing oils for the last few years. We wanted to understand how different products and brands worked with our specific car. </div><div><br></div><div>We have removed all sythethic and semi-synthetic lubricants from our car.</div><div><br></div><div>We have switched back to very high quality conventional mineral based lubricants. </div><div><br></div><div>Some of the products we are using go back to things that we learned racing Porsche cars 35 years ago. Things that some of the foremost Porsche racing experts in the US shared with us over the years. These are people that support many racing winning cars all over the US. One is an engineer by trade. Our car is much happier with the conventional lubricants. We chose brands and products very carefully. We research the specs in detail and speak to the engineering departments of the companies that produce them.</div><div><br></div><div>Our findings are this, cars that were engineered and designed to run conventional mineral based oils sometimes prefer them. The tolerances and types of gaskets that were used when our cars were designed pre-date the use of synthetic oils in automobiles. Not to say that synthetics cannot work, however we are happier with our car running very high quality conventional lubricants. We have found that the additive packages and detergents in modern synthetic are too aggressive for our car. They were causing us more pains than benefits. We change the oils on a regular basis, so aggressive additive packages are not a big benefit for us.</div><div><br></div><div>A couple things to consider when choosing them:</div><div><br></div><div>1. Gear Oil - If you have a limited slip, make sure it has the correct additive package for the LS. If you still have brass in the gearbox or diff, make sure the oil does not exclude its use with brass. This is not as simple as just GL-4 or GL-5 specs. There are a lot of GL-5 spec oils that are safe with brass. The brass issue comes down to other additives. Read the label and check with the company that makes it.</div><div>2. Engine Oil - High ZDDP content is important </div><div><br></div><div>We just got done running pretty hard at BHF in very hot weather. As many as 4 sessions a day with only 15 minute breaks between some of them. Our car was very happy with the conventional products that are in it now. Temperatures of the motor and gearbox were down and shifting was very consistent throughout all sessions.</div><div><br></div><div>Just my experience and thoughts.</div><div><br></div><div>Paul Ricco</div><div><div><br><blockquote type="cite"><div>On Jun 22, 2022, at 9:29 AM, fubog1 via Fot <<a href="mailto:fot@autox.team.net" target="_blank">fot@autox.team.net</a>> wrote:</div><br><div><div style="font-style:normal;font-variant-caps:normal;font-weight:normal;font-stretch:normal;font-size:10pt;line-height:normal;font-family:Arial,Helvetica,sans-serif"><div><font size="2">Yup same here, it makes the sync rings crunchy!<br></font></div><div><br></div><div><font size="2">Glen Efinger</font><br></div><div><br></div><div><br></div><div style="font-family:arial,helvetica;font-size:10pt"><font size="2">-----Original Message-----<br>From: John H. Hasty via Fot <<a href="mailto:fot@autox.team.net" target="_blank">fot@autox.team.net</a>><br>To:<span> </span><a href="mailto:walt@hot-tr6.com" target="_blank">walt@hot-tr6.com</a><span> </span><<a href="mailto:walt@hot-tr6.com" target="_blank">walt@hot-tr6.com</a>><br>Cc: Brad Eells via Fot <<a href="mailto:fot@autox.team.net" target="_blank">fot@autox.team.net</a>><br>Sent: Wed, Jun 22, 2022 10:08 am<br>Subject: Re: [Fot] synthetic gear lube<br><br></font><div id="gmail-m_2525745057784627340yiv3750758958"><font size="2"><div>Us three<br clear="none"><br clear="none"><div dir="ltr">Sent from my iPhone</div><div dir="ltr"><div id="gmail-m_2525745057784627340yiv3750758958yqtfd29078"><br clear="none"><blockquote type="cite">On Jun 22, 2022, at 9:21 AM, walt--- via Fot <<a href="mailto:fot@autox.team.net" style="color:blue;text-decoration:underline" target="_blank">fot@autox.team.net</a>> wrote:<br clear="none"><br clear="none"></blockquote></div></div><div id="gmail-m_2525745057784627340yiv3750758958yqtfd35771"><blockquote type="cite"><div dir="ltr"></div></blockquote></div></div><div id="gmail-m_2525745057784627340yiv3750758958yqtfd61108"><div><div id="gmail-m_2525745057784627340yiv3750758958yqtfd40284"><div><div style="margin:0in;font-size:11pt;font-family:sans-serif">I have a lot of experience using synthetic lubricants in racing engines, transmissions and differentials. There are lots of advantages such as the differential running cooler etc. however the limited slip probably will not function as effectively. With regards to transmissions it has been my experience that with synthetic lube installed the syncros do not function as effectively and shifts will be slower, you’ll have to double clutch more then parts will fail.</div><div style="margin:0in;font-size:11pt;font-family:sans-serif">Walter Hollowell</div><div style="margin:0in;font-size:11pt;font-family:sans-serif"> </div><div style="border-style:solid none none;border-top-width:1pt;border-top-color:rgb(225,225,225);padding:3pt 0in 0in"><div style="margin:0in;font-size:11pt;font-family:sans-serif"><b>From:</b><span> </span>Fot <<a href="mailto:fot-bounces@autox.team.net" style="color:blue;text-decoration:underline" target="_blank">fot-bounces@autox.team.net</a>><span> </span><b>On Behalf Of<span> </span></b>Aaron Johnson via Fot<br clear="none"><b>Sent:</b><span> </span>Wednesday, June 22, 2022 6:27 AM<br clear="none"><b>To:</b><span> </span>DAVE HOGYE <<a href="mailto:dlhogye@comcast.net" style="color:blue;text-decoration:underline" target="_blank">dlhogye@comcast.net</a>><br clear="none"><b>Cc:</b><span> </span>Brad Eells via Fot <<a href="mailto:fot@autox.team.net" style="color:blue;text-decoration:underline" target="_blank">fot@autox.team.net</a>><br clear="none"><b>Subject:</b><span> </span>Re: [Fot] synthetic gear lube</div></div><div style="margin:0in;font-size:11pt;font-family:sans-serif"> </div><div><div style="margin:0in;font-size:11pt;font-family:sans-serif">i've heard of good l with lightweight shock proof in the transmission as well. Maybe a quick note to Jamie Houseman (<a shape="rect" href="http://racegearbox.com/" rel="noreferrer noopener" style="color:blue;text-decoration:underline" target="_blank">racegearbox.com</a>) as he is the T50 Guru!</div><div><div style="margin:0in;font-size:11pt;font-family:sans-serif"> </div></div><div><div style="margin:0in;font-size:11pt;font-family:sans-serif">aaron</div></div></div><div style="margin:0in;font-size:11pt;font-family:sans-serif"> </div><div><div><div style="margin:0in;font-size:11pt;font-family:sans-serif">On Tue, Jun 21, 2022 at 11:26 PM DAVE HOGYE via Fot <<a shape="rect" href="mailto:fot@autox.team.net" rel="noreferrer noopener" style="color:blue;text-decoration:underline" target="_blank">fot@autox.team.net</a>> wrote:</div></div><blockquote style="border-style:none none none solid;border-left-width:1pt;border-left-color:rgb(204,204,204);padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in"><div style="margin:0in 0in 12pt;font-size:11pt;font-family:sans-serif">Same as Brad.<br clear="none">Dave H.<br clear="none">> On 06/21/2022 7:00 PM Brad Eells via Fot <<a shape="rect" href="mailto:fot@autox.team.net" rel="noreferrer noopener" style="color:blue;text-decoration:underline" target="_blank">fot@autox.team.net</a>> wrote:<br clear="none">><span> </span><br clear="none">> <span> </span><br clear="none">> Redline MT-90 GL-4 for the gearbox.<span> </span><br clear="none">><span> </span><br clear="none">> Redline Lightweight Shockproof for the diff.<br clear="none">><span> </span><br clear="none">> Brad Eells<br clear="none">> Sent from my iPhone<br clear="none">><span> </span><br clear="none">> > On Jun 21, 2022, at 6:56 PM, McKearn McKearn via Fot <<a shape="rect" href="mailto:fot@autox.team.net" rel="noreferrer noopener" style="color:blue;text-decoration:underline" target="_blank">fot@autox.team.net</a>> wrote:<br clear="none">> ><span> </span><br clear="none">> > <br clear="none">> > Hi Friends.<br clear="none">> > I am looking for recommendations as to which synthetic gear lube to use in my GT6? Transmission is Toyota T50, rear end is GT6 ,would like to convert both to synthetic. <span> </span><br clear="none">> > Thanks. 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