Michelle Mulherin (Mayo, Fine Gael)
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175. To ask the Minister for Finance the test the State Laboratory uses to establish the illegal component used in petrol such as to leave a residue of carbon on the piston and thus causing damage to engines by contaminated fuel; and if he will make a statement on the matter. [46938/14]

Michael Noonan (Limerick City, Fine Gael)
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I am informed by the State Laboratory that petrol consists of a range of different hydrocarbons and other components and must comply with certain physical and chemical specifications such as density, distillation characteristics and other fuel quality parameters.  The State Laboratory does not use just one test to establish whether a petrol sample meets the required specifications but uses a range of tests to detect fuel fraud and to check that suspect petrol samples submitted for analysis meet relevant fuel quality specifications.