Goodyear researchers discover that using soybean oil in tires potentially can increase tread life 10% and reduce the tire maker’s use of petroleum-based oil by up to 7 million gallons (26.5 million L) each year. Tests also show rubber compounds made with soybean oil blend more easily with the silica used in building tires, improving plant efficiency while reducing energy consumption and greenhouse-gas emissions, Goodyear says. Prototype tires built in Lawton, OK, will be tested ...

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