Answer / saravanan

This is a multigrade oil

w - mean for cold season or winter season operation
15 - thinness at lower temperature
40 - thckness at higher temperature

Answer / rakesh sharma

it is multigrade oil.
W stands for winter whereas value 15 and 40 stands for the
value of viscosity at low and high ambient temperatures.

hi gys.. I too want sample papers of hpcl(mech) please help me......plz..... mail me dnaik2006@gmail.com

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