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50+ Years
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Emergency
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Expert Diesel Repair Services in Roseburg, OR
Southern Oregon Diesel has been a trusted name in diesel repair since 1954, founded by Boyd and Emma Gregory to serve the logging industry's critical needs. Over 66 years of continuous operation, we've evolved from a niche repair shop to a comprehensive diesel service provider while maintaining our family-owned ethos. Our team of factory-trained journeyman technicians utilizes cutting-edge diagnostic tools like Snap-On Verus and Ford IDS systems to service major diesel platforms including Cummins, Duramax, and Powerstroke engines.

With a vast parts inventory and 24-hour part availability, we ensure minimal downtime for both local customers and national fleets. Our commitment to quality workmanship at reasonable prices has earned us recognition as Cummins repair experts and a go-to resource for diesel truck owners across Oregon and beyond. We combine dealership-level expertise with the personalized service and community focus that defines our family-run operation.
Services
Diesel Engine Repair Cummins Repair Diagnostic Services Parts Supply Fleet Maintenance Turbo Systems Repair Drivetrain Services A/C Systems Electronic Diagnosis Pre-Purchase Inspections
Details
  • Year established: 1954
Highlights and features
  • We offer 66+ years of diesel repair expertise since 1954
  • Our technicians use state-of-the-art Snap-On diagnostic tools
  • We maintain extensive diesel truck parts inventory with 24-hour availability
  • Specialized in Cummins, Duramax, and Powerstroke engine repairs
  • Factory-trained journeyman technicians ensure precise diagnostics and repairs
What people say
Expert diesel professionals Genuinely nice about everything Problem fixed within hour Reasonable rates Cleaned entire engine bay
Services
Diesel Engine Repair
Specializing in comprehensive diesel engine diagnostics and repairs for commercial fleets and personal vehicles. Our factory-trained technicians handle Cummins, Duramax, and Powerstroke engines using advanced diagnostic tools. We provide complete engine overhauls, component replacements, and preventative maintenance to ensure optimal performance and longevity for heavy-duty diesel applications.
Diagnostic Services
Utilizing state-of-the-art Snap-On Verus and Ford IDS diagnostic systems for precise issue identification. Our computerized diagnostics analyze engine performance, electrical systems, and component functionality across major diesel platforms. This technology enables efficient troubleshooting of complex engine management systems and emission controls for faster, more accurate repairs.
Parts Supply
Maintaining extensive inventory of diesel truck components with same-day availability for most parts. We stock genuine manufacturer parts and premium aftermarket alternatives for Cummins, Duramax, and Powerstroke engines. Our parts department supports both immediate repairs and preventative maintenance needs with expert recommendations from experienced staff.
Fleet Maintenance
Comprehensive maintenance programs for commercial trucking fleets to reduce downtime and control operating costs. Services include scheduled preventative maintenance, emergency repairs, and parts logistics management. Our dedicated fleet service team supports local, regional, and national operators with reliable diesel engine maintenance and 24/7 emergency assistance.
Pre-Purchase Inspections
Detailed mechanical evaluations for used diesel truck buyers. Our inspections cover engine condition, transmission performance, drivetrain integrity, and electrical systems. We provide comprehensive reports on potential issues, maintenance requirements, and vehicle value assessment to help customers make informed purchasing decisions for both personal and commercial acquisitions.
Questions
What diesel engine brands do you service?
We specialize in Cummins, Duramax, and Powerstroke engines for both personal and commercial diesel trucks.
Do you offer emergency repair services?
Yes, we provide emergency diesel repair assistance including holiday service for stranded travelers.
Can you perform pre-purchase inspections?
Yes, we offer comprehensive pre-purchase inspections covering engine, transmission, drivetrain, and electrical systems.
What diagnostic tools do you use?
We utilize Snap-On Verus and Ford IDS diagnostic systems with latest software updates for precise diagnostics.
Are parts always in stock?
We maintain extensive inventory with most parts available within 24 hours if not immediately in stock.
Do you service commercial fleets?
Yes, we provide fleet maintenance programs for local, regional, and national trucking operations.
Reviews (4)
Keith Yori
Jun 23, 2022 Report
I liked them until they stopped doing oil changes in pick up trucks. My 200 F250 7.3 liter now goes to someone else. They reached out after my review and said they still do oil changes on pick ups but are a little pricey. Thank you for the update.
Charles McAllister
Mar 24, 2022 Report
If you have an problems with your diesel rig, please go see Dennis and crew at Southern Oregon Diesel. They have been great for all of my needs.
Tad Anglin
Oct 11, 2021 Report
Called for an estimate after I had changed my injectors and ficm. Pickup wouldn't start. Gave me an estimate I could live with so made the appointment. High pressure oil pump was shot. They replaced the bad parts and fixed one of my screw ups. Did a great job and had my pickup back in a short time. Definitely use them again.
Lonnie Liles
Mar 03, 2021 Report
Southern Oregon Diesel in my opinion is the best diesel shop in the roseburg area. I have taken my truck in there twice now for totally different things. They have made sure I was in the loop with what was going on letting me know other things that didn't need to be fixed right now but to keep an eye on. They are always a little backed up so it can take some time to get in but I have not felt like they were rushing to get me out the door at all.

The second time I had to take my truck in I was having an issue and called them up and we went over the notes from the first time just to make sure it wasn't anything they had seen and it wasn't but I got a call back from them a couple hours later asking me to bring it by so they could make sure and they cleared a spot in their schedule to take an look at it that day. I will definitely take any of my diesel trucks there from here on out. Thanks guys.