Prevent Breakdowns. Save Money. Keep Your Truck Earning — Not Waiting

Cincinnati’s trusted diesel team for full-service maintenance, faster turnaround, and cleaner engines.

Save money on fuel and maintenance
Reduce downtime and costly repairs
Certified diesel techs, trusted by local fleets

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Our Maintenance Services

Stay ahead of costly repairs. Our preventive maintenance services keep your truck compliant, efficient, and earning every mile.

Oil & Filter Changes
Fresh fluids reduce wear, improve fuel economy, and extend engine life.
100-Point DOT Inspections
We catch violations before they sideline your truck.
Preventive Maintenance Plans
Customized by mileage, routes, and fleet size.
Engine Diagnostics
Quick answers from advanced scan tools, not trial-and-error.

Top 5 Common Engine Issues & Preventative Maintenance

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Routine Maintenance: The Cheapest Insurance You’ll Ever Buy

Every trucker knows downtime kills profits. Routine diesel maintenance isn’t just about oil changes — it’s about preventing the breakdowns that cost you thousands in lost loads and late deliveries. At E&J Commercial Diesel, we make it easy to stay ahead of problems with straightforward, honest service.

Whether you’re an owner-operator prepping for a DOT inspection or a fleet manager balancing multiple rigs, we help you avoid violations, extend component life, and keep your trucks road-ready.

Ask About Fleet Maintenance Programs

The E&J Difference

Fast Turnarounds

We know every hour in the
bay is money lost

No Surprises

Transparent pricing & recommendations only when needed

Trusted Locally

Family-owned, 40+ years serving Cincinnati truckers

Got Questions? We’ve Got Answers.

Yes. We maintain a complete record of your truck’s mileage, services performed, and upcoming maintenance so you don’t have to. This prevents missed oil changes, overlooked inspections, or repeat breakdowns caused by skipped services. For fleets, we provide detailed reporting across every truck, so managers can see exactly what’s been done and what’s due next. That means fewer surprises, less downtime, and lower long-term costs.

Absolutely. We know maintenance can’t always be planned perfectly. If you’re running behind or notice a warning light before a trip, we’ll do our best to get your truck in quickly. Our shop prioritizes minimizing downtime, so we keep flexible scheduling for urgent maintenance needs. For fleets, we can set up recurring service times so last-minute scrambles aren’t necessary.

Yes. We perform comprehensive pre-DOT inspections to catch issues before they cost you money in fines or downtime. From lights and brakes to fluids and safety equipment, we go through every major point a DOT inspector will check. If we find a problem, we fix it on the spot whenever possible, saving you time and keeping your truck compliant.

Yes. Our fleet preventive maintenance programs are built around your trucks’ mileage and routes, not a one-size-fits-all schedule. We can manage service intervals, provide detailed reporting for compliance, and keep costs predictable. For fleets, this means fewer breakdowns, longer component life, and significantly less downtime. Ask us about setting up a customized fleet maintenance plan.

Preventive maintenance is the cheapest insurance against catastrophic repairs. A few hundred dollars in fluid changes and inspections can save you thousands in injector, turbo, or DPF replacements. It also improves fuel economy, reduces the risk of violations, and keeps your truck earning instead of sitting. In short: maintenance costs pennies compared to breakdowns.