Oil Skimmer Visco Engineers design & manufactures all types of oil skimmer on the customer requirements. VISCO make Oil skimmers are simple, dependable and an effective machine for removing oil, grease and other hydrocarbons from water. Often, skimmer by itself can achieve the desired level of water purity. In more demanding situations, skimming is a cost-effective means of removing most of the oil before using more complicated and costly treatments such as coalesces, membrane filters and chemical processes.