does fully synthetic get thicker or thinner as it heats up??
ie when it is 1st cold it is thicker than when at operating temperature
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www.storme.co.uk
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All oils get thinner as they heat up.
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All oils thin with use, a typical 5w-40 will be 800cst at 0degC and 14cst at 100degC - That's a lot of thinning!
Cheers
Simon
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