High output low emission engines significantly increase demands on engine lubricants. Tighter engine design use of inter coolers and turbochargers increase thermal stresses on the lubricant. Low emission engine technologies such as higher fuel injection pressure retarded timing and aftertreatment devices all require improved oil performance in areas such as oxidation stability soot dispersancy volatility and compatibility with aftertreatment devices. The advanced technology in Mobil Delvac XHP ESP 10W 40 delivers exceptional performance long drain interval capability and protection of exhaust systems including those fitted with Diesel Particulate Filters DPF .