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Engine oil getting lesser
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<blockquote data-quote="mengz" data-source="post: 1296389" data-attributes="member: 8556"><p>instead of adding additive to make the viscosity go higher, y not just get an engine oil which has high viscosity? i remember i read somewhere when an engine oil contains too much Viscosity Index Improvers(VI), under high temp & shear forces, the molecules of the VI tend to change shape thus lowering the quality of the engine oil gradually. also, how much viscosity will the oil additive add? what brand issit u using? does it state clearly by adding how much, ur bringing up the viscosity by how much?</p><p></p><p>also, ur above post, u said a car with shell helix ultra will lose more than shell helix plus and super. i think u kinda misunderstood engine oil viscosity. actually, shell helix ultra and shell helix plus both are 15w50, only difference is one is fully-syn and the other is semi-syn. shell helix super is 20w50. the only difference is the W which doesnt make much difference here in malaysia. so how come shell helix ultra loses more engine oil than the other 2? all 3 engine oils are 50 viscosity at operating temp. so why do u say shell helix super has the highest viscosity?</p></blockquote><p></p>
[QUOTE="mengz, post: 1296389, member: 8556"] instead of adding additive to make the viscosity go higher, y not just get an engine oil which has high viscosity? i remember i read somewhere when an engine oil contains too much Viscosity Index Improvers(VI), under high temp & shear forces, the molecules of the VI tend to change shape thus lowering the quality of the engine oil gradually. also, how much viscosity will the oil additive add? what brand issit u using? does it state clearly by adding how much, ur bringing up the viscosity by how much? also, ur above post, u said a car with shell helix ultra will lose more than shell helix plus and super. i think u kinda misunderstood engine oil viscosity. actually, shell helix ultra and shell helix plus both are 15w50, only difference is one is fully-syn and the other is semi-syn. shell helix super is 20w50. the only difference is the W which doesnt make much difference here in malaysia. so how come shell helix ultra loses more engine oil than the other 2? all 3 engine oils are 50 viscosity at operating temp. so why do u say shell helix super has the highest viscosity? [/QUOTE]
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