John Baker | Nov 29, 2017 8:22 AM First Signature Series Synthetic Motor Oil , then XL Synthetic Motor Oil . Now, OE Synthetic Motor Oil is our latest oil to undergo a formulation change and facelift. What’s New? Everything. The oil inside the bottle, the label…essentially everything except the name. Excellent Wear Protection The protection the oil delivers is even different, as in better. The added protection is particularly important in the extreme environments produced by today’s smaller displacement engines that often run lower viscosity oil. Camshaft wear, for example, can result in poor valve timing, greatly reducing engine efficiency and leading to expensive repairs. The Peugeot TU3M Wear Test (CEC L-38-A-94), which must be passed to meet the GM dexos1® Gen 2 specification, determines a motor oil’s ability to limit wear. For 100 hours the four-cylinder test engine is subjected to extreme, wear-inducing conditions. AMSOIL OE Motor Oil provided 4