TLT TRIBOL OGY & L UBRICA TION TECHNOL OGY SYSTEMS, STRATEGIES & RESEARCH FOR LUBRICATION PROFESSIONALS AN PUBLICATION | AUGUST 2013 Bringing used oil back to life PLUS Future of on-site oil analysis Reader survey: MWF industry’s biggest challenges Third type of friction observed at the nanoscale Why do curling stones curl? Digital TLT: Sponsored by Münzing at www.stle.org.