3000520 oil filter

3000520 Heavy Duty Engine Oil Filter The 3000520 engine oil filter is a premium aftermarket lubrication filter manufactured according to heavy-duty vehicle industrial standards, specially designed for large diesel trucks, passenger coaches, construction machinery and stationary diesel generator units. During long-time heavy-load driving and continuous operation, engine lubricating oil will mix with metal wear debris, carbon deposits, sludge, dust and tiny impurities produced inside the engine. These pollutants circulating in the lubrication system will cause serious wear to bearings, crankshafts, pistons and other precision core components, leading to unstable oil pressure, insufficient power, loud engine noise, shortened service life and frequent mechanical breakdowns. This 3000520 filter adopts multi-layer gradient composite filtration structure to efficiently capture fine solid contaminants, always keeping the circulating engine oil clean. It ensures smooth oil supply and stable lubrication effect, greatly reducing internal engine friction wear and cutting unnecessary maintenance costs. With strict quality control in production, it can maintain stable filtration efficiency under high oil pressure and high-temperature working conditions, becoming an essential protective part for logistics fleets, engineering vehicles and industrial power equipment running in complex working environments all year round.  Product Material Description: Filter Media: High-density multi-layer composite fiber filter paper with dense pleats, stable filtration precision, large dirt holding capacity and excellent compatibility with various diesel engine oils; Outer Shell: Thickened high-strength cold-rolled steel housing with electrophoretic anti-rust coating, resistant to oil corrosion, external impact and outdoor scratch damage; Sealing Ring: Premium nitrile rubber (NBR), featuring outstanding high temperature resistance, oil resistance and anti-aging performance, achieving tight sealing without oil leakage under long-term compression; Internal Reinforced Metal Skeleton: Galvanized supporting frame prevents filter element collapse and deformation under sustained high lubricating pressure; Built-in Silicone Anti-Drain Valve: Prevents engine oil backflow after shutdown effectively, avoiding dry start wear of engine core parts.