NEW YORK – Research engineers at Shell Global Solutions say they have achieved a 6.5% jump in vehicle fuel efficiency in recent tests using a concept ultra-low-viscosity lubrication oil. The results beat the 2.5% improvement achieved in “in typical fuel economy lubricant-development programs,” Shell says. The mileage gain was achieved with the urban part of the standard European test cycle (NEDC), which uses a chassis dynamometer. Shell claims the urban cycle is particularly appropriate ...

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