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Reply to "Rejection limits of viscosity of 15W40 oil?"

Hi we are fortunate enough to be monitoring 30 large Compression ignition rail engines and 20+ large spark ignition gas engines,
the no go used by these engine owners is +/- 10% original spec, this may be a bit conservative but there has never any outrage using this spec,
As to which system to measure with we use an external lab so our experience is not so good in this area although kinematic shears the fluid so would that could be best,

hope of this is of use and maybe other can fill in the gaps,

Regards Rob S
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