Fleet Maintenance Insights.

Expert tips, diesel repair guides, and the latest trends in commercial vehicle maintenance to keep your fleet running flawlessly year-round.

Service Intervals

The 100k Mile
Preventative Checklist

Never miss a critical service milestone. Follow this standardized commercial fleet preventative maintenance schedule to ensure maximum uptime.

Every 10,000 Miles

Standard lube, oil, and filter (LOF). Comprehensive visual inspection of hoses, belts, and undercarriage.

  • Oil & Filter Change
  • Grease Chassis
  • Tire Pressure & Tread
  • Fuel Filter Replacement
  • Air Filter Inspect/Replace
  • Brake Adjustment

Every 30,000 Miles

Brake stroke measurement and adjustment. Fuel system filter swap to prevent injector fouling.

Every 50,000 Miles

Complete drivetrain fluid swap, including transmission and differential. DPF health check and forced regen if necessary.

  • Transmission Fluid
  • Differential Fluid
  • DPF Inspection
  • Coolant Flush
  • Valve Lash Adjustment
  • DPF Cleaning/Bake

Every 100,000 Miles

Overhead valve adjustment, complete cooling system flush, and DPF removal for professional baking.

Multimedia

Diesel Tech Podcasts

View All Episodes
Podcast Episode
Episode 42 45 Mins

Interview with a Master ASE Tech: The Future of EV Fleets

We sit down with a veteran diesel mechanic to discuss how electric trucks are changing the maintenance landscape.

Episode 41

Navigating DPF Regens on the Road

Quick tips on handling forced regens when you're 500 miles from the nearest terminal.

Episode 40

Fluid Analysis Deep Dive

How to read an oil sample report like a pro to prevent catastrophic engine failure.

Episode 39

Brake Air Systems Explained

Diagnosing hard-to-find air leaks in heavy-duty commercial trailers and tractors.

Technical Deep Dives

In-depth articles tackling the most complex engine fault codes, emissions systems, and electronic diagnostics.

Emissions

The Truth About SCR Systems and DEF Quality

Poor quality Diesel Exhaust Fluid can crystallize and destroy an entire SCR catalyst. Learn how to test DEF concentration before it ruins your exhaust system.

Read Full Guide
Electrical

Chasing Parasitic Draws on Commercial Vehicles

Dead batteries every morning? We walk you through step-by-step multimeter testing to isolate phantom electrical drains across multiplexed wiring harnesses.

Read Full Guide
Engine

Variable Geometry Turbo (VGT) Actuator Failures

A stuck VGT actuator can simulate major engine issues. Learn how to clean and test the VGT linkage before spending thousands on a completely new turbocharger.

Read Full Guide
Diagnostic Tool
Hardware Review

Next-Gen OEM Diagnostic Scanners

We review the top rugged diagnostic tablets used by mobile diesel mechanics. From bi-directional controls to live data graphing, find out which scanner provides the best ROI for independent service providers.

  • Wireless VCI Connectivity

    Test components while walking around the rig.

  • Topology Mapping

    Instantly see the health of the entire CAN bus network.

Read the Review Breakdown

Fast Fix Tech Tips

Quick, actionable advice from our mobile service trucks straight to your inbox. No fluff, just wrench-turning reality.

Air Dryer Purge

If your air dryer is purging every 30 seconds, don't just replace the cartridge. Check the unloader valve on the compressor first.

Battery Banks

Always replace all 4 batteries at once. One weak battery will drag down the new ones within a matter of weeks.

EGR Coolers

Unexplained coolant loss without visible leaks? Pull the EGR crossover tube and check for white buildup.

Wheel Seals

A leaking wheel seal isn't always the seal's fault. Check the axle vent tube; if it's clogged, pressure blows the seal.