Polyisobutylene succinimide for: use as a dispersant in engine oil, use as a dispersant in gear oil, use as a dispersant in ink pigments, use as a detergent in fuels, use as an asphaltene inhibitor in oilfield-drilling processes, use as an asphaltene inhibitor in oilfield-completion processes, use as an asphaltene inhibitor in oilfield-production processes, use as an emulsifier in the further manufacture of explosives, use as an emulsifier in oilfield-drilling operations, use as an emulsifier...