McLarens Lubricants Celebrates the 100th Anniversary of Mobil Delvac. When Rudolf Diesel’s engine first turned in 1897, the world had no idea what it was about to set in motion. Established in 1925, DELVAC stands for “Diesel Engine Lubricant by Vacuum Oil. Every load that moves, every harvest that reaches market, every container that clears the port does so powered by diesel engines, and very often, lubricated by Mobil Delvac. Today’s Delvac portfolio, anchored by Delvac Modern and Delvac Legend, the relaunched lineup introduced for the Sri Lankan market, represents the accumulated knowledge of ten decades of engineering, field performance, and customer partnership.