Fuel prices have climbed sharply in recent weeks, putting renewed pressure on fleet operators to reduce diesel consumption and protect margins. Across the market, this has become a consistent theme in customer conversations—fleets are actively searching for practical, measurable ways to manage rising costs without compromising service levels.
A recent fuel efficiency guide from Commercial Carrier Journal highlights several important best practices, particularly around tractors and driver behavior. However, it leaves a significant gap: trailer operations. For fleets relying on reefer trailer rental, refrigerated trailer leasing, or semi-trailer rental, this is where a substantial, often untapped opportunity exists.
At PLM, we help customers go beyond high‑level recommendations by delivering data‑driven fleet management solutions, advanced trailer technology, and operational discipline that directly reduce fuel spend and total cost of ownership.
Why Trailer Strategy Matters More Than Ever
Fuel remains the number‑one operating expense for most business fleet operations. Even small efficiency gains—when applied across hundreds or thousands of trailers—translate into meaningful cost savings.
While many fleets focus on aerodynamics or idle reduction, refrigeration unit (TRU) operation is often the single largest and most controllable fuel lever in fleet operations.
This is where PLM’s integrated fleet management services, including ColdLink telematics, create a competitive advantage.
1. Start/Stop vs. Continuous Mode: The Biggest Fuel Lever
The way a refrigeration unit operates has a direct impact on fuel consumption.
Start/Stop Mode (Best Practice for Most Loads)
Start/Stop (Cycle Sentry / Auto Mode) should be the default setting for the majority of freight:
- Unit shuts off once setpoint is reached
- Restarts only when temperature variance occurs
- Reduces runtime, engine hours, fuel burn, and maintenance
Measured fleet results:
- Up to 40% reduction in TRU runtime
- Up to 40% fuel savings
- Approximately $5,000 per trailer annually in combined savings
For fleets utilizing reefer trailers for rent, 53 ft trailer leasing, or semi trailer leasing, these savings scale quickly across the network.
When Continuous Mode Is Necessary
Continuous mode is not wrong—but it is often overused due to habit or perceived risk.
It remains appropriate for:
- Pharmaceuticals
- Fresh produce
- Floral and temperature‑sensitive goods
- Ice cream or frozen novelties
- Loads with strict airflow requirements
The challenge is ensuring the correct mode is used every time—a problem PLM solves through ColdLink telematics and automated policy enforcement.
2. Pre‑Cooling Discipline: A Simple Fix with Big Impact
Improper pre‑cooling is one of the most common—and costly—mistakes in refrigerated transport.
Best Practices for Pre‑Cooling:
- Pre‑cool the trailer to within 5°F of the product temperature
- Ensure cargo is already conditioned before loading
Without proper discipline, fleets waste fuel trying to compensate for temperature imbalances—especially in scenarios where equipment is shared across users.
PLM helps enforce these standards through fleet management solutions and real‑time monitoring.
3. Door Open Protocols: Eliminating Hidden Fuel Waste
One of the most overlooked fuel drains happens during loading and unloading.
What Commonly Goes Wrong:
- TRU remains on while doors are open
- Unit shifts into high‑speed cooling mode
- Short cycling increases fuel use and wear
Best Practice:
- Turn the unit off when doors are open, unless airflow is required
For fleets using commercial trailer, 53 foot trailer, or reefer trailer, these inefficiencies can compound across multiple stops daily.
4. Setpoint Management Errors: Small Mistakes, Big Costs
A simple operator error can lead to significant fuel waste and product risk.
Common Issue:
- Temperature is adjusted but not confirmed
- Unit reverts to the previous setpoint
- Results in over‑cooling, excess fuel burn, and potential claims
PLM eliminates this risk with standardized controls and visibility through MyPLM and ColdLink.
5. Defrost Strategy Optimization
Manual interventions often do more harm than good when it comes to defrost cycles.
Best Practices:
- Avoid forced defrost unless necessary
- Allow modern microprocessors to manage cycles
- Only intervene if alarms indicate ice buildup
Unnecessary defrost cycles increase runtime, fuel usage, and maintenance costs—especially across large fleet services operations.
6. Turning Data into Action with ColdLink Telematics
Technology is what transforms best practices into measurable results.
PLM’s ColdLink telematics platform enables:
- Real‑time and historical monitoring of refrigeration modes
- Alerts when continuous mode is used incorrectly
- Notifications when runtime exceeds expected thresholds
- Temperature variance tracking against load specs
- Automated enforcement of operating policies
For fleets searching for a scalable fleet management company or fleet management services, this removes driver guesswork and ensures consistent execution across the fleet.
Final Takeaway
In today’s high‑fuel‑cost environment, fleets can no longer rely on traditional efficiency strategies alone.
Refrigeration operation strategy can deliver greater fuel savings than aerodynamics or idle reduction—often by a wide margin.
By combining:
- Best‑in‑class operating practices
- Advanced trailer technology
- Real‑time telematics
- Scalable fleet maintenance and management services
PLM helps fleets move from awareness to repeatable, measurable cost reduction.
Start the Conversation
Every fleet is different. The most effective way to reduce fuel costs is to understand current operations, identify inefficiencies, and implement targeted solutions.
PLM is here to be a resource—not just a provider of trailer leasing or trailer rental—but a partner in improving your fleet’s performance and profitability.