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Welcome to Diesel Emissions Service

Quality Drives Us!


Latest Projects

Oregon Grants

Owners of Vehicles

with Diesel Engines in Oregon

Feb 01, 2024, to May 30th, 2024, Oregon DEQ is accepting grant applications to fund retrofits on older diesel vehicles to meet emissions requirements.



VIN Stops have begun in the tri-county Portland area.

The Diesel Retrofit Compliance Program in the State of Oregon is here.

These regulations could affect your ability to operate certain older diesel vehicles.


DES Locations

DES is your headquarters for aftertreatment service, retrofits, parts, diagnostics & more.

West Coast DES locations:

 Redding, CA. | Sacramento, CA | Portland, OR | Vancouver, BC.


Our Work

Diesel Emissions Service is here to serve your retrofit diesel emissions needs. We’ve done thousands of retrofits.

Our extensive knowledge and experience make us the clear choice for retrofitting on the West Coast.



Redline Emissions Products® is our full line of DPFs & DOCs and accessories for light and heavy duty application.

Filtertherm® is all about DPF Cleaning machines. We offer Aqueous & Thermal DPF cleaning systems. Purpose-built in the USA.

FILTERtrak™ is the diesel market’s premier DPF service tracking application. Get a free demo of the new version today.

I have been using DES for several years for all of my DPF cleaning and maintenance needs and am very satisfied. Their staff is very knowledgeable and helpful; they usually diagnose problems quickly to get me back on the road. I appreciate the friendly and supportive staff and how they consistently communicate about my orders. I highly recommend Steve and his crew at DES.

Kelly GranberryOperations Manager at Cross Petroleum

Best place around inland empire to get your filters cleaned out. I love the way they give you pictures of before and after of the work they do. Will keep going to them... no one in the inland empire does that and gets the filters as clean as they do. Thanks to Frederico, my mobile business will keep on doing work with them in the future.

Jason MorenoCustomer Review on Google

Diesel Emissions Service installs and services the DPF systems in our fleet. They provide quality service and are very knowledgeable on their systems. I would recommend them to anybody in need of DPF cleanings or system repairs.

Larry NobleShasta Union High School District

DES has provided us with excellent professional service since day one. They have a great selection of inventory including gaskets and clamps to finish each job. Every DPF we send them is returned cleaned, sealed and tested. Each cleaning comes with a report with test records, along with before and after photos of every DPF. DES is always willing to go the extra mile. Along with their great service, the turnaround time is second to none and Dave has even come in on a Saturday to help us out! I would suggest them to anyone.

Dan FunkParts Manager of McCoy Freightliner of Portland

Being a small private school with a fleet of only twelve buses, we didn’t have any clout with anyone, but Diesel Emissions Service made us feel we were important to them and gave us much assistance in bringing our buses into compliance. Whenever there's a problem with a system, or just a filter that needs cleaning, they are always there. I have called at some pretty inconvenient times and they have always come. DES has gone to great lengths to keep our buses running for us. That's my idea of service.

Jim SmithRio Hondo Prep

DES performs all of our scheduled maintenance on our DPF units as well as our Preventative Maintenance. They are also our mechanic of choice when our vehicles break down. For over 3 years we have used DES exclusively and never had a complaint. They are prompt, courteous and well aware of our scheduling needs.

James NortonTrainer/Dispatcher Robla School District

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