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Its not a synthetic. <a
href="https://cglapps.chevron.com/sdspds/PDSDetailPage.aspx?docDataId=77118&docFormat=PDF">https://cglapps.chevron.com/sdspds/PDSDetailPage.aspx?docDataId=77118&docFormat=PDF</a><br>
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<div class="moz-cite-prefix">On 8/15/2020 4:45 PM, Doug Tallman
wrote:<br>
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cite="mid:deb32389-77ef-8aea-3f88-06e20b670182@accnorwalk.com">
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<p><font size="+1">I would say the problem is the synthetic oil.
It is too slick for some engines. A buddy bought a fairly new
motorhome with the GM 8.1. Since he wanted it to last he
changed to synthetic oil. First trip out they coated the tow
car with oil coming out the back. Dang the rotten luck, pulled
the trans and replaced the rear main. No other signs of leaks.
Next trip it was the same thing. With some research he found
that GM recommended not using synthetic. Changed back to
regular oil and problem solved. Doug T</font><br>
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<div class="moz-cite-prefix">On 8/15/2020 12:57 PM, John Hall
wrote:<br>
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<blockquote type="cite"
cite="mid:1b1d1e0e-653f-5219-7b85-e74c7473bde9@nc.rr.com">Chevron
Dello 400</blockquote>
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