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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>You seem to have not worried about it when you changed to synthetic, why worry about it when switching back. There are a lot of old and new cars on the road. If dinosaur oil and synthetic are not compatible, how could anyone ever switch from one to the other? It would hurt oil companies bottom line.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>John<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span></b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'> Healeys [mailto:healeys-bounces@autox.team.net] <b>On Behalf Of </b>i erbs<br><b>Sent:</b> Thursday, November 3, 2016 7:46 AM<br><b>To:</b> Ahealey help <healeys@autox.team.net><br><b>Subject:</b> [Healeys] dino oil, synthetic, then dino oil<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>One more oil question...<o:p></o:p></p><div><p class=MsoNormal>I changed from Castrol 20/50 to lucas race oil (synthetic) can I change back to Castrol, or use Castrol High milage, which is another synthetic? Thanks. At least I know I want 20/50 and know about how much my car is worth :)<br clear=all><o:p></o:p></p></div></div></div></body></html>