Monitoring of the Physical and Chemical Properties of a Gasoline Engine Oil during Its Usage

Table 3

Physical properties at different running kilometer.

Property	Test method	Running Kilometer
		0	500	1000	2000	3500	6000	8500	11500
Viscosity at 40°C	ASTM D-445	141.6	140.0	138.3	135.3	137.2	137.8	142.2	143.4
Viscosity at 100°C	ASTM D-445	16.5	16.3	16.0	15.8	15.9	16.1	16.3	16.5
Viscosity index	ASTM D-2270	125.0	126.2	127.3	129.5	128.0	127.5	123.0	122.2
Flash point	ASTM D-92	222	—	—	—	—	—	—	223
Pour point	ASTM D-97	−26	—	—	—	—	—	—	−26
Specific gravity	ASTM D-1298	0.8910	0.8935	0.8942	0.8943	0.8950	0.8963	0.8994	0.9011
Color	ASTM D-1500	2.0	2.8	3.1	3.9	5.1	5.9	6.3	7.5
TAN (mg KOH/g)	ASTM D-664	1.52	1.88	1.94	2.05	2.33	2.61	2.79	3.00
TBN (mg KOH/g)	ASTM D-664	12.37	12.13	12.03	11.80	11.22	10.97	10.82	10.33
Water content	ASTM D-6304	22.1	35.2	43.0	50.1	54.9	61.4	63.0	63.0