Most automotive fuel injector deposits were produced by gasoline containing ethanol but without deposit control additives, says a Coordinating Research Council report. Since it is believed much of the nation's gasoline supply is undertreated with deposit-control additives, this may help to explain regional instances of fuel injector plugging. It also suggests why additives are needed more in gasoline that contains ethanol. The CRC's sustaining members – the American Petroleum Institute, ...

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