Bosch Oil Filter 3978

Bosch Oil Filter 3978 by Bosch. Manufacturer part number: 3978.

• Advanced filtration performance provides 99% efficiency, offering improved engine protection
• Synthetic-enhanced filter media offers optimal filtration over extended oil change intervals
• The silicone anti-drain back valve prevents dry starts in extreme climates throughout the full lifespan of the filter
• Heavy gauge outer shell provides burst resistance, ensuring a strong, reliable filter for its service life
• Designed to protect your engine for the full length of your vehicle manufacturer’s longest recommended oil change interval
• Best match for synthetic and semi-synthetic oil, suitable for conventional oil