Class 8 Trucks
Class 8 Engine Oil Bypass Filter Kit
Engine oil bypass filtration for high-capacity on-highway diesel engines.
Class 8 trucks and heavy on-highway diesel applications
From $2,099.00 — Select Your Application
Engine Oil Bypass FiltrationCleaner Oil.Longer Engine Life.
Factory full-flow filters can't remove the finest wear particles. 0.5 micron bypass filtration continuously polishes your oil—reducing internal wear and helping operators extend engine life 2–3×.
0.5 Micron Bypass Filtration — Find Your System
The Stakes
Your Engine Can't Afford the Wear Particles Factory Filters Leave Behind.
Full-flow filters operate around 20–40 micron—they balance oil flow, not the finest abrasive particles. Those particles stay in your oil, grinding bearings, turbos, and cam components every hour the engine runs.
Cam & bearings
$8,000–$22,000
Turbo assembly
$4,000–$8,000
Major rebuild
$20,000–$45,000
0.5 Micron Bypass Filtration Changes the Outcome.
When oil stays continuously polished at this level, internal wear drops and engines last longer. Many operators also extend oil drain intervals—with proper analysis and maintenance. Fewer catastrophic failures. Real money stays on your bottom line.
The Oil May Look Clean. The Wear Particles Aren't.
Reduce Internal Wear. Extend Engine Life.
0.5 micron bypass filtration continuously removes the abrasive particles that break down your lubrication film—the same contamination factory filters leave behind.
Pure Flow Solutions Bypass · 0.5 Micron
Your OEM full-flow filter (~20–40 micron) has to balance filtration with oil flow—it is not designed to remove the finest wear particles. Pure Flow Solutions runs alongside it—slowly polishing oil and returning cleaner lubricant to the sump while the engine operates.
Measured Proof · ISO 4406 Testing
Particles/mL · Before
223,069
Fewer Particles
99.37%
@ 4 μm
Particles/mL · After
1,409
ISO 25 / 22 / 19 → 18 / 16 / 11
Independent oil analysis on real equipment—not marketing claims.
Engines don't usually die because the oil disappeared. They wear out from millions of microscopic wear events over thousands of hours.
Component Wear
Unplanned Downtime
Shorter Equipment Life
Watch It Work
0.5 micron bypass loop—separate from your OEM full-flow filter.
Real Proof
We Measure. You See It.
Particles per milliliter—what actually changed in the oil.
Before
223,069
Particles/mL
99.37%
Cleaner
After
1,409
Particles/mL
Measured particle count per milliliter · ISO 4406 25 / 22 / 19 → 18 / 16 / 11
What 0.5 Micron Filtration Targets
Factory full-flow · ~20–40 micron typical
Pure Flow Solutions bypass · 0.5 micron rated
Typical Bypass Plumbing
Bypass does not feed from or return to the full-flow filter.
Pressurized port → restricted flow → filter → non-pressurized return
01
Establish baseline
02
Compare samples
03
Monitor over time
Results vary based on equipment, operating conditions, oil condition, sampling method, and service interval. Engine and oil life outcomes depend on application and maintenance.
Protect the Engine You Already Paid For.
$$ Reduce expenses. Increase profits.
Medium Duty
Medium Duty Engine Oil Bypass Filter Kit
Application-specific systems for construction, mining, agriculture, and vocational equipment.
Off-highway equipment and high-contamination oil loops
From $1,899.00 — Select Your Application
Diesel Pickups
Pickup Truck Engine Oil Bypass Filter Kit
Compact bypass filtration systems for supported light-duty diesel applications.
Diesel pickups and lighter-duty engine applications
From $989.00 — Select Your Application
Replacement Elements
Replacement Filter Elements
Correct replacement filters for existing Pure Flow Solutions installations.
Contact us with your system details for the correct element
Installed on Real Equipment
Trucks · Pickups · Construction · Heavy Machinery
Questions
No. Your OEM full-flow filter stays in place. Pure Flow Solutions adds a separate 0.5 micron bypass loop—it does not feed from or return to the full-flow circuit.
Pure Flow Solutions uses MICFIL's Bypass Elements, which are rated to 0.5 micron. Factory full-flow filters typically operate in a much coarser range. That finer filtration is what continuously removes contamination that breaks down the lubrication film.
Oil is tapped from a pressurized gallery or port, restricted to a slow controlled flow, passed through the 0.5 micron bypass element, and returned to the pan, sump, or oil cap. The loop runs continuously while the engine operates.
Cleaner oil helps maintain the lubrication film and reduce abrasive wear. We have seen customers double and triple expected engine life when oil stays continuously cleaned at this level—and many operators extend oil drain intervals with proper analysis. Results vary by equipment, duty cycle, and maintenance.
Yes. Baseline and follow-up ISO 4406 sampling can document improvement on your equipment. Results vary by application.
Ready to Put Cleaner Oil to Work?
Tell us what you operate. We will match the right system.
Single trucks, fleets, diesel pickups, and heavy equipment.