AMSOIL Cummins Single-Remote Bypass System (BMK34)
A vehicle-specific bypass filtration system for supported Cummins applications. Check AMSOIL's current fitment information before ordering.
View BMK34 at AMSOILBypass Filter Guide
Is an AMSOIL Bypass Oil Filter Worth It?
Understand the benefits, limits and installation considerations before adding bypass filtration.
Featured AMSOIL products
These products are relevant to this guide. Click a product to view current specifications and availability for the selected application.
AMSOIL Ea Oil Filters
AMSOIL offers synthetic-media oil filters in many application-specific sizes. Use the vehicle lookup to confirm the correct filter number for your engine.
View AMSOIL Oil FiltersProduct images courtesy of AMSOIL INC. Product availability and specifications can change; verify fitment before ordering.
Who should consider bypass filtration?
Bypass filtration is most interesting for owners who put substantial mileage on a vehicle, operate in demanding service or want supplemental fine-particle filtration. It is less compelling when annual mileage is low or the added installation complexity provides little practical benefit.
Real-World AMSOIL Bypass Filter Install
Our Cummins installation video shows what adding bypass filtration actually involves on a working tow vehicle.
Do not treat a filter as permission to ignore maintenance
A bypass filter supplements the full-flow filter. It does not eliminate the need to monitor oil condition, maintain the engine or follow the requirements that apply to your oil and vehicle.
Related AMSOIL guides
Frequently asked questions
Is a bypass oil filter worth it?
It can be valuable for some high-mileage or heavy-service diesel owners who want supplemental fine filtration. Value depends on vehicle use, installation cost, maintenance goals and the specific application.
Does bypass filtration make engine oil last forever?
No. Oil still experiences additive depletion, contamination and other changes. Follow applicable service guidance and use oil analysis if relying on condition-based extended drains.