☰
Shop by Vehicle
Find AMSOIL Near You
Roll over image to zoom in

AMSOIL Heavy-Duty Bypass System

Product code : BMK30-EA

4.8 star rating
Read 153 reviews
Read 153 reviews

  • Superior filtration performance for heavy-duty on- and off-road applications
  • Helps extend engine life
  • Efficient removal of small particles and soot that full-flow oil filters can’t capture alone
  • Improved oil cooling
  • Reduces maintenance costs
Product Overview

AMSOIL Heavy-Duty Bypass System



Maximum filtration performance for virtually all heavy-duty diesel and gasoline applications, including Class 6, 7 and 8 heavy-duty trucks, off-road equipment, buses, generators, marine engines, logging and agricultural equipment.

See the product data sheet for full details.

Maximum Filtration Protection

  • Efficient removal of small particles and soot that full-flow oil filters can’t capture alone
  • Removal of particles 2 microns and larger
  • Improved oil cooling
  • Reduces maintenance costs

Offer Extended Service Life

  • Helps extend engine life
  • Increased fluid system capacity
  • Increased filtration capacity and life
  • Helps extend oil drain intervals

See the product data sheet for full details.

BMK30 Installation and Servicing Instructions

Note: For fitting suggestions and fitting locations, please reference the BMK30 Fittings List

Technical Specification

AMSOIL Heavy-Duty Bypass System

Data Bulletin

Warranty



Product Reviews

AMSOIL Heavy-Duty Bypass System

4.8 star rating
Based on 153 reviews
Based on 153 reviews
See all customer reviews
  • 5 star rating
    Excellent
    By  BRODY,  a  Verified Buyer  on  April 30, 2025
    Would highly recommend running this bypass filter kit on any engine especially an after treatment engine. Great product!
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 4 star rating
    Bypass filter
    By  BEN,  a  Verified Buyer  from  Prince George  on  March 21, 2025
    Great filtration and increases oil life!
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Bypass oil filter save your engine
    By  STURE,  a  Verified Buyer  from  MN  on  March 14, 2025
    I added a bypass oil filter after 3k on my truck. The mechanics at the dealer who do my warranty work have also added this product to their vehicles. It is the best addition to the engine since Mr. Otto invented the auto-motor.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Great filters
    By  MATTHEW,  a  Verified Buyer  on  February 19, 2025
    I purchased this bypass system so I can have the ease of going to my local store to buy the filters. Everything seems great so far I would recommend to anyone. I will be purchasing another one for my fleet trucks
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Bypass
    By  TOM,  a  Verified Buyer  from  Florida  on  January 22, 2025
    This is a excellent product. Very high quality. Works as designed. Also since there is nowhere to mount this filter system on my truck, I ordered a bracket system for my truck that I found on U Tube . I think this should have been mentioned.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Super nice oil bypass system
    By  HEATH,  a  Verified Buyer  from  Colorado  on  January 04, 2025
    Excellent!! Get NOW
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Super nice oil bypass system
    By  HEATH,  a  Verified Buyer  from  Colorado  on  January 04, 2025
    Makes changing the oil 100% easier Cleans up the oil really well Wasn't too hard to install Much longer oil change intervals Thank you Amsoil!!
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Best protection for my duramax
    By  LUIS,  a  Verified Buyer  from  Miami   on  December 30, 2024
    It’s the best decision ever made, my duramax engine runs great
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Works great
    By  JOSEPH,  a  Verified Buyer  from  Hollywood Florida   on  December 29, 2024
    Help keep my oil clean. Especially with a diesel it can get very dirty but this really helps keep the oil clean.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    No Oil Filter is better—none!
    By  STURE,  a  Verified Buyer  from  Elk River, MN  on  November 12, 2024
    No Oil Filter is better—none! I have used this product since May 2020. My diesel engine purrs like a content kitten, and I have gone 15K miles between oil changes.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?