A product of Lubrication Engineers, 8800 Monolec Ultra is a 15W-40 engine oil designed for year-round, extended drain service in diesel and gasoline engines. The product has been reformulated to meet the latest robust API CJ-4 standard for engine oils, designed for 2007 low-emission engines. It is also backwards-compatible, for use in both older and newer engines. Other Lubrication Engineers' products appropriate for construction applications include 8130 Monolec Ultra 10W-30 and 8420–8450 Monolec GFS engine oils, and the 2410-2420 BTU+ diesel fuel improvers.