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Fuel adulteration is a big menace in India. It not only affects the engine components but also hampers the country economy. The main driving force for this malpractice is the difference in the pricing of various hydrocarbon products. Till recently, PDS kerosene was used in a big way to adulterate petrol and diesel. However, with the opening up of the economy many other streams and side products are readily available, which are frequently being used as adulterants for prime fuels. Oil industry as well as Government of India has taken various measures to curb this menace and the present paper gives an overview on different measures taken to put an end to the adulteration of prime fuel with other streams. Further, in a significant move to curb adulteration of petrol and diesel, Marker Systems is being used that promises to stamp out the problems of adulteration.

India is having a large population of two stroke cycle engines. Before the advent of two stroke engine oils in India, motor oils were used to be mixed alongwith gasoline for two stroke engine lubrication for those vehicles having premixed type of lubrication system. The motor oils due to the high ash containing additives give rise to problems like pre-ignition, spark plug whiskering and combustion chamber deposits thereby leading to frequent breakdown of engines for maintenance. During the '8∅s the development of two stroke engine oils was taken up and the two stroke oils, confirming to ASTM/CEC standards, were introduced in the market. Due to the diversified designs of the two stroke engines owing their origin to both European and Japanese engine builders, it was felt necessary to have the Indian standards for two stroke engine oils comprising tests that incorporate both these types of engines.