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How do you think multi-grade is achieved? Viscosity modifiers + Pour point-depressants.
Do not want to wipe the cams? Zinc additives. Long life? Detergents.
Basically, a pure synth oil would not be a good oil in ICE engine. Jet turbine, yes.
Ah, one more thing. Most of oils you believe are "synthetic" are just cracked mineral oils.
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Thank you for your time,
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