Lucas Long Drain Truck Oil is a high-TBN oil designed to last up to twice as long as plain 15/40 oils. You can expect less oil consumption and higher oil pressure. This oil provides cool, quiet performance with extended drain intervals, longer engine life, and no dry starts. It is a perfect blend for diesel as well as gasoline engines. You can expect less oil consumption and reduced engine wear. It resists oxidation and thermal breakdown for total protection in new and older engines. Provides increased lubricity, lowers oil temperature, reduces engine noise, increases oil pressure, and reduces soot levels. Suitable for use in gasoline and diesel powered engines. Lasts up to twice as long as ordinary 15W-40 engine oils. Lucas Oil SAE 15W-40 Magnum Synthetic CJ-4 Long Drain Truck Oil is backward compatible with all old and new engines using Ultra Low Sulfur Diesel. Lucas Oil CJ-4 is compatible with all after treatment devices and keeps EGR engines clean.