中文字幕有码在线视频欧美
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WHAT IS “W” GRADE?

“W” = WINTER

The “W” designation means the oil can be used in winter

The lower the "W" number the better the oil's cold temperature / cold start performance.

Two series of viscosity grades :

(A) those containing the letter W
(B) those without W.

(A) Single viscosity grade oils with the letter W are defined by maximum low temperature cranking and pumping viscosities and a minimum kinematic viscosity at 100C.

 

(B) Single grade oils without the letter W are based on a set of minimum and maximum kinematic viscosities at 100C and a minimum high shear rate viscosity at 150C.

SALUTE TO IMPRESS

中文字幕有码在线视频欧美
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