The Diesel Doctor

The Diesel Doctor Been in business since 1980. Automotive repair shop in El Cajon specializing in diesel repair, and any other automotive repairs. Opened up Diesel Doctor in 1981.

I have finished Diesel School in 1980. First it was mobile for 5 years then I opened the shop for ten years. And went back to be mobile ever since. I have worked with both gasoline and diesel engines, all small engine diesels from marine to transport trucks, automotive. Now specialized in Fords, Chevys and Dodges, emergency equipment, fleets and privately own vehicles. Familiar with MTS Inspections and CHP inspections. I carry ASE, Brake and Light Certificates, Just finished GM tech class.

Did you know that the average lifespan of a commercial diesel engine can be over 1 million miles with proper maintenance...
09/03/2026

Did you know that the average lifespan of a commercial diesel engine can be over 1 million miles with proper maintenance? Keeping your mid-size commercial vehicles running strong requires regular attention, just like any workout! A consistent preventative maintenance schedule, from fluid checks to filter replacements, is key to avoiding costly downtime and ensuring peak performance on Bostonia's roads. For dependable diesel care, visit us at 1301 Pepper Dr Suite C, El Cajon, CA 92021, call (619) 749-9286, or check out https://www.thedieseldoctorsd.com/.

Ever wonder how often you should really be changing your diesel's oil? 🤔 It's not just about mileage! Factors like drivi...
09/02/2026

Ever wonder how often you should really be changing your diesel's oil? 🤔 It's not just about mileage! Factors like driving habits and the type of diesel can make a big difference. Keeping up with oil changes is crucial for your engine's health and longevity. ⚙️

Understanding the complexity of diesel engine components is crucial for effective maintenance and repair. This involves ...
09/01/2026

Understanding the complexity of diesel engine components is crucial for effective maintenance and repair. This involves detailed inspection of the drivetrain, suspension, and exhaust systems to ensure optimal performance and longevity.

A complex diesel engine being meticulously worked on showcases our expertise! At The Diesel Doctor, we specialize in kee...
09/01/2026

A complex diesel engine being meticulously worked on showcases our expertise! At The Diesel Doctor, we specialize in keeping your diesel powered vehicles running smoothly. From critical oil services to ensuring your brakes are at their best, our skilled technicians in Bostonia, California, have you covered. Trust us to deliver quality repairs. Visit us at 1301 Pepper Dr Suite C, El Cajon, CA 92021, call us at (619) 749-9286, or learn more on our website: thedieseldoctorsd.com. 🛠️🚗

Just another day in the shop. This ambulance is up on the lift getting some TLC. It's always cool to see these vehicles ...
08/28/2026

Just another day in the shop. This ambulance is up on the lift getting some TLC. It's always cool to see these vehicles up close, knowing they play such a vital role. We get all sorts of medium-duty vehicles here in Bostonia, and we're ready for whatever rolls in.

Myth: Diesel trucks are inherently more reliable and require less maintenance than gasoline vehicles. Fact: While diesel...
08/27/2026

Myth: Diesel trucks are inherently more reliable and require less maintenance than gasoline vehicles. Fact: While diesel engines often boast longevity, they still require specialized maintenance, including proper oil changes and brake care, to perform optimally and prevent costly repairs on your medium-duty commercial truck.

Is your trusty diesel truck ready for anything? Keeping an eye on brake fluid levels and ensuring your oil changes are o...
08/26/2026

Is your trusty diesel truck ready for anything? Keeping an eye on brake fluid levels and ensuring your oil changes are on schedule are key to keeping your mid-size commercial vehicle running smoothly on Bostonia roads. 🛢️
Give us a call at (619) 749-9286 or visit us at 1301 Pepper Dr Suite C, El Cajon, CA 92021 for expert advice.

Did you know that a well-maintained diesel engine can last over one million miles? Regular service ensures peak performa...
08/26/2026

Did you know that a well-maintained diesel engine can last over one million miles? Regular service ensures peak performance and longevity for your medium-duty trucks.

08/24/2026

Oil leak on your 6.7L Cummins? I’ll bet this is your culprit. Extremely common for the rear timing cover seal to leak. It’s a paper gasket in the worst location. We are here to help address it, and get you back on the road! Give us a call today!

Ever have your commercial vehicle break down unexpectedly? It's a real headache, especially when you're trying to keep y...
08/24/2026

Ever have your commercial vehicle break down unexpectedly? It's a real headache, especially when you're trying to keep your business rolling. That's where having the right tools and know-how makes all the difference. For reliable service on your mid-size commercial vehicles right here in Bostonia, give The Diesel Doctor a call at (619) 749-9286 or stop by 1301 Pepper Dr Suite C, El Cajon, CA 92021. You can also learn more on our website: https://www.thedieseldoctorsd.com/

Address

1301 Pepper Drive Suite C
El Cajon, CA
92021

Opening Hours

Monday 7:30am - 4:30pm
Tuesday 7:30am - 4:30pm
Wednesday 7:30am - 4:30pm
Thursday 7:30am - 4:30pm
Friday 7:30am - 4:30pm

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