The draw on alcohols in diesel engines is a way of reducing dependence on diesel. Particularly, high alcohols like nbutanol (nB) consist of carbons. These alcohols can be produced from easily available sources. When they are mixed with diesel, the mixed fuel exhibited enhanced properties and thereby engine gave better performance and less emission. Various works are going on to analyze the characteristics of engine which uses alcohol. The present work examines the possibilities of using alcohol in diesel engine. In this experimental work, butanol is blended with diesel in varying Proportions and its experimentally tested in CI engine. Experimental result were compared with that of diesel.