高大大
高大大
评一个产品好不好，看数据比较说明问题；打群架不管用，但很生动有趣。
1.The Thin-Film Oxygen Uptake Test (TFOUT) (ASTM D-4742) measures the oxidation stability of engine oils.
Mobil 1 ------------------------469 min
Motorcraft Synthetic Blend --------------277 min
Castrol GTX ---------172 min
2. The High Temperature/High Shear Test (HTHS) (ASTM D-4683) measures a lubricant’s viscosity under severe operating conditions.
Mobil 1 ---------------- 3.22 cP
Motorcraft Synthetic Blend --------------- 3.05 cP
Castrol GTX --------------- 3.19 cP
3. Evaporation Loss of Lubricating Oils Test (NOACK ) (ASTM D-5800) measures the evaporation loss of oils in high temperature service.
Mobil 1 --------------- 7.49 %
Motorcraft Synthetic Blend ----------------- 8.84 %
Castrol GTX ------------- 6.77 %
4. Pour Point Test (ASTM D-97) indicates the lowest temperature at which a fluid will flow.
Mobil 1 ------------ -57 F
Motorcraft Synthetic Blend ----- -25 F
Castrol GTX ------ -29 F
5. Total Base Number Test (TBN) (ASTM D-2896) is the measurement of a lubricant’s reserve alkalinity for combating acids.
Mobil 1 ------------11.89 mg KOH/g
Motorcraft Synthetic Blend -------- 8.00 mg KOH/g
Castrol GTX --------- 8.52 mg KOH/g
6. The Cold Cranking Simulator Test (CCS) (ASTM D-5293) indicates the degree to which a lubricant can impact cold weather starting.
-25 ▫C Viscosity (cP):
Mobil 1 ---------- 4742
Motorcraft Synthetic Blend --------- 4021
Castrol GTX ------------ 6101
7. The Four-Ball Wear Test (ASTM D-4172) evaluates the protection provided by engine oil under conditions of pressure and sliding motion.
Wear Scar Diameter (mm):
Mobil 1 ---------- 0.55
Motorcraft Synthetic Blend ----------- 0.65
Castrol GTX ----------- 0.60
