TLT TRIBOLOGY & LUBRICATION TECHNOLOGY SYSTEMS, STRATEGIES & RESEARCH FOR LUBRICATION PROFESSIONALS AN PUBLICATION | APRIL 2018 Oil Analysis Past and Future How improvements in this multi-disciplinary science are paving the way for tomorrow’s tribologists. 14 YEARS of publishing excellence Intro to detergents Types, chemistries, functions and properties Q&A with Anirudha Sumant Energy efﬁciency and novel carbon materials Auto Tribology Return of the Wankel? Rational Rationality Why public policy succeeds—and fails Fore! The tribology of golf clubs Seal applications Your most difﬁcult problems (and solutions) STLE 365 App Annual Meeting section sponsored by Focus Chemical. Digital TLT: Sponsored this month by Bruker at www.stle.org.