IndIan mInIng company extends oIl-draIn Intervals wIth shell rImula r4 total estImated annual customer savIng us$427,428 a leading Indian mining company operates a range of heavy-duty equipment, including items from hyundai, ashok leyland, v olvo and schwing stetter, in challenging working conditions. the company was using an engine lubricant that gave a maximum oil-drain interval of 350 hours and wanted a lubricant with a longer oil- dr

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