Disclaimers

Date Published: February 26, 2026 | Last Modified: 1 hour ago | 3 minute read by Matt Brill at Redwater Dodge

The Fleet Manager’s Dilemma: Gas vs. Diesel Ram Trucks

Are gas engines cheaper to maintain? 

Choosing the right powertrain for your fleet isn't just about the sticker price; it’s about calculating the Total Cost of Ownership (TCO) over the life of the vehicle. Matt at Redwater Dodge, home of the Rig Ready Rams, hears this question every week: "Should I go with the HEMI® gas engine or the Cummins® Turbo Diesel for my fleet?"

The answer depends entirely on your duty cycle, idling requirements, and your long-term exit strategy. Here is the breakdown of how these two powerhouses compare in a commercial environment.


The Case for Gas: Lower Upfront Costs and Simplified Maintenance

For many fleet companies, the 6.4L HEMI® V8 is becoming the preferred choice. The primary driver here is the lower initial investment. A gas-powered Ram typically carries a significantly lower MSRP than its diesel counterpart, allowing fleet managers to put more boots on the ground for less capital.


Maintenance Advantages:

Maintenance on a gas engine is straightforward. You are dealing with standard oil changes and spark plug intervals without the added complexity of Diesel Exhaust Fluid (DEF), particulate filters, or expensive fuel water separators. If your fleet operates in urban environments with frequent short trips, the gas engine reaches operating temperature quickly and avoids the "clogging" issues sometimes seen in diesel emissions systems during short-cycle use.



The Case for Diesel: Longevity, Torque, and Fuel Economy

While the upfront cost is higher, the Cummins® Turbo Diesel is the undisputed king of the long haul. If your fleet trucks are consistently hauling heavy equipment or traversing long highway distances, the fuel efficiency of the diesel engine often offsets its higher per-gallon price point.



The "Idle" Factor:

In many industries, a truck isn't just a transport vehicle; it’s a mobile office. This means high idle hours. Matt at Redwater Dodge points out a critical distinction: Diesels are built to run. A diesel engine can handle 5,000 idle hours with far more grace than a gas engine. In a gas-powered truck, excessive idling can lead to premature engine wear and carbon buildup, potentially requiring a motor replacement far sooner than expected.



The "Exit" Factor: Resale Value

A fleet is an asset, and eventually, that asset must be liquidated. This is where the diesel engine shines. When it comes time to trade in your fleet at Redwater Dodge, a diesel Ram historically commands a much higher resale value. The market perceives a diesel engine with 200,000 kilometers as "just getting started," whereas a gas engine at the same mileage is often nearing the end of its primary service life.



Final Verdict: The Mixed Fleet Approach

Modern fleet managers are moving toward a "Mixed Fleet" strategy. Use gas-powered Rams for light-duty, local runs, and "runner" trucks where maintenance simplicity is key. Reserve the Cummins Diesel for your heavy-towers and high-idle crews.


Additional Common Questions & Answers


Q1: Does the Ram Cummins Diesel require more frequent service than the HEMI?

A1: While the intervals may be similar, the cost per service is higher for diesel due to larger oil capacities and the need for fuel filter replacements. However, these costs are often mitigated by the engine's longer overall lifespan.


Q2: How does cold weather affect gas vs. diesel fleet use?

A2: Gas engines typically start more easily in extreme cold without being plugged in. Modern Rams have excellent block heaters and winter fronts for diesels, but for "jump-in-and-go" utility in sub-zero temps, gas has a slight edge.


Q3: Which engine offers better payload capacity?

A3: Generally, a gas-powered Ram will have a slightly higher payload capacity because the engine itself is lighter than the Cummins diesel, leaving more "room" for weight in the bed within the GVWR (Gross Vehicle Weight Rating).

Matt Brill-- Sales Manager at Redwater Dodge