I'm not an engine guru and could use some help troubleshooting.&nbsp; I have a slow oil leak and I'm not sure if it is the rear main seal.&nbsp; Can anyone advise based on the picture below?&nbsp; <br><br><img src="attachment.php?attachmentid=80172&amp;stc=1" attachmentid="80172" alt="" id="vbattach_80172" class="previewthumb"><br>&nbsp;