Operation & Maintenance Manual for WP7 Euro Ⅵ Vehicle Diesel Engine 1.5 Features of Weichai Power special oil 1.5.1 High-qualified lubricating oil Adopt fine imported hydrocracking base oil and composite additives to ensure the high quality of lubricating oil. 1.5.2 At normal use, the oil-change interval can be increased by 3,500~7,000km (10,000km for CH-4); excellent oxidation resistance at high temperature and excellent TBN retention will also prolong the engine life. 1.5.3 Professional protection to extend the engine life Through a lot of performance and durability tests on Weichai diesel engines, a professional oil formula suitable for high power and high load engines is worked out.
The special oil can provide the Weichai engine with special protection and can significantly prolong their service life (by 30~40% in contrast with others). 1.5.4 Better performance It features of better wear resistance, TBN retention, anti-rust performance, antioxidation, better fuel consumption control, shear stability and can reduce sediments in the turbocharger.
1.5.5 Energy-saving “Low viscosity + Multi-grade + Friction modifiers”, energy-saving formula, high oil viscosity index, high oil-film strength and elasticity, thus the engine 3 Items Unit Min limit Max limit Urea content % by weight 31.8 33.2 Density at 20℃ kg/m³ 1,087 1,093 Refracting index at 20℃ - 1.3814 1.3843 Alkalinity as NH 3 % - 0.2 Biuret % - 0.3 Aldehyde mg/kg - 5 Insolubles mg/kg - 20 Phosphate (PO ) 4 mg/kg - 0.5 Calcium mg/kg - 0.5 Iron mg/kg - 0.5 Copper mg/kg - 0.2 Zinc mg/kg - 0.2 Chromium mg/kg - 0.2 Nickel mg/kg - 0.2 Aluminium mg/kg - 0.5 Magnesium mg/kg - 0.5 Sodium mg/kg - 0.5 Potassium mg/kg - 0.5