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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.

The deposit formation in the intake system of passenger cars due to cracked components in gasoline leads to loss in fuel economy, increase in emissions and poor driveability problems. Use of multifunctional additives is the most cost effective means worldwide for controlling these deposits Worldwide, there are many test methods used (mostly in house tests) to evaluate the efficacy of the deposit control additives but most of them are based on multi cylinder gasoline engines which are quite cumbersome and expensive. For this reason, it was decided to develop a less expensive, small scale test method based on a modern technology gasoline engine using Honda generator of 5.5 KW capacity. A cyclic test procedure of 80 hours duration has been developed. Several tests were conducted in two generators with different fuels to establish the repeatability and the reproducibility of the test method.