CHICAGO – The question of whether oil companies are adequately treating U.S. gasoline with the proper additives designed to control fuel-injector, intake valve and combustion chamber deposits continues to stir debate among experts (see related story: Inadequate Use of Gasoline Additives Claimed). And other questions are surfacing, as well – what does the U.S. Clean Air Act call for, and is the Environmental Protection Agency adequately carrying out the letter of the law? Ward's is told ...

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