(ADPnews) - Jul 29, 2010 - The end of the USD 0.45 (EUR 0.35) subsidy per gallon (3.785 litres) ethanol will not negatively affect its usage, as this incentive is anyhow "almost irrelevant", Gene Edwards, executive president for corporate development and planning of US oil refiner Valero Energy Corp (NYSE:VLO) was quoted as saying.