SYMBOL: T614 We produce T614 adopting high-quality importing ethyleneropylene rubber raw materials dissolving in hot HVI150 in certain proportion and then degrading by homogenizer in high pressure. The products have fine shear stabilities, good increasing thick ability, hot stability and low-temperature performance, suitable for modulating high and middle grade internal-combustion engine oil of various kinds of viscidity. Make forms and list the probably necessary T614 joining amount while adjusting the multistage oil of grade of various kinds of viscidity. For concocting multi-level oil of various degrees of viscosity ,the addition amount is shown in table below SPECIFICATIONS oil degree OCP-B addition,% 100℃ Basic oil Kinetic viscosity 5W／30 9-11 3.5--4.5 10W／30 8-10 5.0--5.5 10W／40 10-12 4.0--5.0 15W／40 9-11 6.0--7.0 Items Limits Typical number Test Methods Kinetic Viscosity, 100℃, mm2/s ≮800 842 GB/T265 Thickening performance ≮5.2 5.58 SH/T0556 Rate of descent of ultrasonic shear viscidity ≯30 29 SH/T0505 Chroma number ≯2.0 trial GB/T6540 Water,% ≯0.05 1.5 GB/T260 Mechanical impurities,% ≯0.08 0.042 GB/T511 PACKAGE,STORAGE AND TRANSPORATION While using this product as the viscidity index improver concocting the multistage internal-combustion engine oil, temperature should not exceed 120℃.Storing this product for a long time, temperature should not exceed 70℃. Net weight 160Kg per barrel of the products