UNDERSTANDING FILTRATION
Filters aren't just parts. They're protection. Understanding micron ratings, flow rates, and efficiency scores are helpful so you don’t leave your engine exposed. We back our filters with third party lab testing to prove they perform under real world conditions. When you know the specs and trust the data, you choose smarter protection.
UNDERSTANDING FILTRATION
Filters aren't just parts. They're protection. Understanding micron ratings, flow rates, and efficiency scores are helpful so you don’t leave your engine exposed. We back our filters with third party lab testing to prove they perform under real world conditions. When you know the specs and trust the data, you choose smarter protection.
WHAT DO YOU NEED TO KNOW?
Your diesel’s filters are its first line of defense. Quality filtration protects your engine, injectors, and vital components from harmful dirt, soot, and metal particles that can shorten lifespan and kill performance. Investing in premium filters keeps your rig running clean, strong, and ready for every haul.
Efficiency Scores Matter
Filter efficiency isn’t just a number – it tells you how well your filter traps contaminants before they reach critical parts. The higher the efficiency score, the cleaner your oil, fuel, air, or hydraulic system stays, which means less wear and more power when you need it most.
Understanding Micron Ratings
Micron ratings measure the size of particles a filter can catch. A lower micron rating means it traps smaller contaminants. Whether it’s a fuel filter catching fine debris or an oil filter stopping metal particles, the right micron rating keeps your diesel protected under extreme conditions.
Why Flow Rates Are Crucial
Flow rate tells you how quickly oil, fuel, or air passes through the filter. Too low, and your engine starves under load. Too high with poor filtration, and harmful particles slip through. The best filters balance optimal flow with absolute filtration to keep your diesel breathing easy and running strong.
Application Across All Filters
Whether it’s your air filter keeping turbochargers clean, your oil filter protecting bearings, your fuel filter safeguarding injectors, your CCV filter managing crankcase vapors, or your transmission filter keeping shifts crisp, understanding these ratings ensures you choose the best replacement filters to protect your build.
WHAT DO YOU NEED TO KNOW?
Your diesel’s filters are its first line of defense. Quality filtration protects your engine, injectors, and vital components from harmful dirt, soot, and metal particles that can shorten lifespan and kill performance. Investing in premium filters keeps your rig running clean, strong, and ready for every haul.
Efficiency Scores Matter
Filter efficiency isn’t just a number – it tells you how well your filter traps contaminants before they reach critical parts. The higher the efficiency score, the cleaner your oil, fuel, air, or hydraulic system stays, which means less wear and more power when you need it most.
Understanding Micron Ratings
Micron ratings measure the size of particles a filter can catch. A lower micron rating means it traps smaller contaminants. Whether it’s a fuel filter catching fine debris or an oil filter stopping metal particles, the right micron rating keeps your diesel protected under extreme conditions.
Why Flow Rates Are Crucial
Flow rate tells you how quickly oil, fuel, or air passes through the filter. Too low, and your engine starves under load. Too high with poor filtration, and harmful particles slip through. The best filters balance optimal flow with absolute filtration to keep your diesel breathing easy and running strong.
Application Across All Filters
Whether it’s your air filter keeping turbochargers clean, your oil filter protecting bearings, your fuel filter safeguarding injectors, your CCV filter managing crankcase vapors, or your transmission filter keeping shifts crisp, understanding these ratings ensures you choose the best replacement filters to protect your build.
MICRON SIZE 101: THE BREAKDOWN
This chart breaks down the size of different particles—from salt ions all the way up to sand—and shows what kind of filtration it takes to catch them. It also gives you a sense of how small these particles really are by comparing them to what kind of microscope you'd need to even see them. The takeaway? Not all filters are built the same, and knowing the micron size your filter can handle makes all the difference when it comes to protecting your diesel. We also show you where Doc's Diesel filters fall on this chart, which meets or exceeds OEM Requirements.
3RD PARTY TESTED. VERIFIED. TRUSTED.
Don’t just take our word for it—see the numbers for yourself. These independent lab reports break down how our filters perform in real-world conditions, from efficiency ratings to particle capture and flow rates.
Dodge RAM 6.7L/3.0L Cummins Fuel/Water Separator 2019-2024
Dodge RAM 6.7L Cummins Fuel/Water Separator 2010-2024
Dodge RAM 6.7L Cummins Fuel/Water Separator Filter 2013-2018
Chevrolet/GMC 6.6L/3.0L Duramax Fuel Filter 2017-2025
Ford 6.7L Powerstroke Fuel Filter 2017-2025
Ford 6.7L Powerstroke Fuel Filter 2011-2016
Chevrolet/GMC 6.6L Duramax Fuel Filter 2001-2016
SEE RESULTS
Engine Air Filters
Efficiency ISO 5011 3rd Party Testing shows 99.25% / 344.2G Dust Holding Capacity. Filter paper tested is used in entire line of Doc's Diesel Engine Air Filters.
Cabin Air Filters
Electrostatic media stops particles down to .001 Microns.
Oil Filters
25 Micron @ 99% Efficiency Rating. Filter paper tested is used in entire line of Doc's Diesel Oil Filters.
Engine Air Filters
Efficiency ISO 5011 3rd Party Testing shows 99.25% / 344.2G Dust Holding Capacity. Filter paper tested is used in entire line of Doc's Diesel Engine Air Filters.
Cabin Air Filters
Electrostatic media stops particles down to .001 Microns.
Oil Filters
25 Micron @ 99% Efficiency Rating. Filter paper tested is used in entire line of Doc's Diesel Oil Filters.
diesel essentials
Explore our best-selling maintenance products by category. Click to discover top-rated gear.
Doc's Diesel
Ford 6.7L Powerstroke 10R140 Transmission Service Kit 2020-2025
Replaces LC3Z-7G186-A, LC3P-7G186-AC, LC3Z-7F396-A, LC3Z-7F396-B
Doc's Diesel
Chevrolet/GMC 6.6L Duramax 10L1000 L5P Transmission Service Kit 2020-2025
Replaces 24298004
Doc's Diesel
RAM 6.7L Cummins 2WD/4WD Premium E-Coated Front Wheel Hub Assemblies Kit 2019-2024
Replaces 515206
Doc's Diesel
RAM 6.7L Cummins 2WD/4WD Premium E-Coated Front Wheel Hub Assembly 2014-2018 2500, 2013-2018 3500
Replaces 515162
Let customers speak for us
This is the perfect kit. Everything is quality constructed and fits perfect. Will definitely order this every time I'm due for service.
After ordering many filters I’ve always used power service
Filters were great so I decided to try this treatment
Bought a fuel filter and the quality seems amazing and got some really cool stickers with my order
This guys are on top of things when it comes to service. Almost feel like they communicate with my truck.
I’m about to order the front hubs, it’s that time. Overall 5 stars.
best filters on the market hands down! great customer service and all around company as well! will continue to buy everything from docs diesel
Great quality everything comes in one box clearly labeled items everything was a perfect fit and high-quality
Great quality filters! Great prices and most of all amazing customer service! I ordered a filter kit and the box was damaged along with the air filter due to improper packing. Contacted them and within 30 min they responded/apologized and had a new filter on its way to replace as well as insuring packing issues would be looked into and taken care of. Which when I received my new air filter it was packaged neatly and securely. Highly recommend and will continue buying from Docs Diesel!
Quality material, stitching on the front looks great.
I placed an order with Docs for routine maintenance stuff. Docs got it boxed up and shipped out in good time. Ups on the other hand decided that Docs was treating me way to good. On the day of delivery Ups decided it would be good to just leave my box sitting out in a complete downpour rain event. Now had they locked on the door to notify my wife this wouldn't have been so detrimental. Upon arriving home from work I noticed a soggy wet box sitting on my walkway. Every filter and box inside had been soaked with not just rain but fuel treatment as well. Apparently Ups is not very gentle with our packages. I notified Docs and without hesitation they shipped all the damaged products a second time. I am not writing this to give people ideas or anything but to let people know that this is a great business that stands on customer service. Thank you Docs for handling this situation and taking care of your customer.
Love the products. Keeps my jeep going
Always fast delivery, Always great products! Fuel filters, oil filters, oil, air cleaners, all of it works great!!
Packaging was great, all came in one box. They through in some stickers which as any other person that works in construction knows we love stickers. Both air filters fit great, both fuel filters fit great as well as oil filter. The filter plug is a must. I couldn't imagine the mess I would have made on the concrete if I didn't have it.
Order was quick. This was my 2nd time using this for my truck. Perfect .
Easy to replace
Perfect fit
Keeps the fuel clean
He loved it y’all made his day