Tests

Samples

Germany

Virgin oil 15 W/40

Russian

Virgin oil 15 W/40

Kurdistan-Region/Iraq*P value

Re-refining oil 15 W/40

Flash point ˚C

235

231

214

<0.001

Pour point ˚C

−25

−22

−10

<0.001

Specific gravity

0.8611

0.8667

0.8813

0.997

API

32.82

31.76

29.05

0.291

Kinematic viscosity (cSt)

193.5

189.6

169.7

<0.001

Carbon residue

0.5231

0.5912

1.31

0.838

Water & sediment (mL)

0.0

0.0

0.0

Nan