
Mobil Delvac is a line of heavy-duty diesel engine oils that are developed and manufactured by ExxonMobil. These oils are designed for use in a wide range of on-highway and off-highway diesel engines, including those used in trucks, buses, construction equipment, and other types of heavy machinery. They are formulated to provide superior wear protection, maintain engine cleanliness, and improve fuel economy. The oils also contain advanced additives that protect against the harmful effects of soot and other contaminants, as well as high-temperature operation. Some of the Mobil Delvac oils meet industry specifications such as API CK-4, API CJ-4, and ACEA E9-12. They also offer a range of synthetic and semi-synthetic options for more demanding applications.