Re: [問題] 冬天在北部用Tec會不會不適合？
SAE引擎機油黏度等級
低溫黏度 高溫黏度
A B C D
最低 最高
0W 6200 at -35 60,000 at -40 3.8
5W 6600 at -30 60,000 at -35 3.8
10W 7000 at -25 60,000 at -30 4.1
15W 7000 at -20 60,000 at -25 5.6
20W 9500 at -15 60,000 at -20 5.6
25W 13000 at -10 60,000 at -15 9.3
20 5.6 <9.3 2.6
30 9.3 <12.5 2.9
40 12.5 <16.3 2.9(0W-40,5W-40,10W-40grades)
40 12.5 <16.3 3.7(15W-40,20W-40,25W-40,40grades)
50 16.3 <21.9 3.7
60 21.9 <26.1 3.7
註：
A:低溫(at °C)曲動最高黏度2 (cP)
B:低溫(at °C)泵動最高黏度3 (cP)
C:100°C動力黏度4 (cSt)
D:150℃高溫高剪切最低黏度5(cP)
1 Cp=1 mPa's; 1 cSt=mm2s-1
1.詳細規範請參照ASTM D 3244
2.ASTM D 5293 (即簡稱為CCS黏度)
3.ASTM D 4684(see also appendix B and text section 4.1):The presence of any
yield stress detectable by this method constitutes a failure regardless of
viscosity.
4.ASTM D 445
5.ASTM D 4683, ASTM D 4741, CEC-L-36-A-90
資料來源http://www.ld.cpc.com.tw/oilinfo/viscosity1.htm
一般我們用的都屬複合式機油
所以都會有兩個黏度指標
5w/50 代表 他符合5W跟50的範圍
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