As the lubricants are updated, what kind of viscosity index improver should be used in it? Polyisobutylene or Olefin Co-Polymer(OCP) can be adapted to low temperature performance in multigrade combustion engine oil ?
As the lubricants are updated, what kind of viscosity index improver should be used in it? Polyisobutylene or Olefin Co-Polymer(OCP) can be adapted to low temperature performance in multigrade combustion engine oil ?
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