Wesfil Australia Pty Ltd sources its air, oil, fuel & cabin filters from quality assured suppliers who manufacture to meet the performance requirements appropriate to the application. Filters out harmful contaminants found in engine oil Ensures that clean & filtered oil is circulated through your engine Protects your engine for the entire service interval Designed to meet OE standards & Fitment Anti drain-back valve preventing oil draining back out of the filter through the inlet holes By-pass valve ensures protection of the engine against oil starvation Strong internal components such as springs and element assemblies Heat tolerant seals and O-rings