Every business runs its machinery in its own way. Some fleets spend long hours on the highway, moving loads across state lines. Others work closer to home, like construction equipment grinding through dust and heat, or waste trucks running constant stop-and-go routes. Even within the same industry, no two fleets operate exactly alike. That’s why the oil you choose matters more than you might think.

The right engine oil does more than keep parts moving smoothly. It helps you stay on top of maintenance, cut downtime, boost fuel efficiency, and manage operating costs. Every fleet runs differently, whether it’s long highway hauls, stop-and-go city driving, or heavy loads in extreme temperatures, and those conditions change what your engines need. There’s no one-size-fits-all oil, but there are smarter choices that fit the way you work.

That’s where Chevron’s Delo 600 ADF engine oil stands out. Built for the toughest conditions, it adapts to the way you work, helping fleets and equipment stay reliable no matter how demanding the job. Operators are seeing cleaner engines, longer maintenance intervals, and consistent performance across mixed workloads.

At Greg’s Petroleum, we understand that no two operations are the same. That’s why we help you choose lubricants that match your unique conditions and goals—so your equipment keeps running, your schedules stay on track, and your business stays efficient.

What Is Delo 600 ADF Matters
In simple terms, Delo 600 ADF is a next-generation heavy-duty diesel engine oil designed for today’s demanding engines, especially those equipped with diesel particulate filters (DPFs) and other after-treatment systems. The “ADF” stands for “After-Treatment Compatible, Diesel Future,” and it’s engineered with Chevron’s patented OMNIMAX® ultra-low ash technology.

Here’s what makes it different:

  • It uses non-metallic additive chemistry rather than traditional metallic compounds, reducing sulfated ash content by up to 60% compared to standard CK-4 oils.
  • It’s suitable for mixed fleets, including those with CNG engines, simplifying lubricant inventory and reducing the risk of misapplication.
  • Real-world testing shows longer oil drain intervals, fewer DPF cleanings, and less downtime caused by soot and ash buildup.
  • In practice, that means less time in the shop, lower maintenance costs, and better uptime for the trucks and machines that keep your business moving.

Real-World Fleet Results: Ecology Transportation
One of the most compelling case studies for switching to Delo 600 ADF comes from Ecology Transportation Services, which operates more than 600 trucks hauling waste, recyclables, and specialized loads throughout Southern California.

After switching its fleet to Delo 600 ADF, the company saw:

  • Oil drain intervals extended from roughly 30,000 miles to 40,000 miles
  • DPF cleanings reduced from 250,000 miles to about 400,000 miles
  • Simplified maintenance, since both diesel and CNG units could use the same oil

When those gains are multiplied across hundreds of vehicles, the difference in uptime, cost per mile, and shop hours is significant.

How Delo 600 ADF Works

  • Ultra-Low Ash Formula: Traditional engine oils rely on metallic additives for wear protection and oxidation control. Over time, these metallic residues can clog after-treatment systems, causing backpressure and costly DPF service events. Delo 600 ADF reduces that risk by using non-metallic chemistry that protects the engine while keeping the DPF cleaner for longer.
  • High-Temperature Stability: Modern heavy-duty engines operate under intense heat and pressure. Delo 600 ADF resists oxidation, keeping the oil stable and protective through longer drain intervals and high-load conditions.
  • Wear Protection Without Compromise: Even with lower ash content, Chevron’s OMNIMAX® additive package delivers strong wear protection for key components, such as bearings, turbochargers, and more.
  • Mixed-Fleet Compatibility: If your fleet runs on a mix of diesel and gas engines, Delo 600 ADF can simplify your life. It’s one oil that can meet multiple engine needs, helping you streamline logistics and reduce the risk of using the wrong product.

Why Your Fleet Should Consider Switching
As you plan your maintenance and budgeting strategy for the year ahead, consider what Delo 600 ADF can do for your business:

  • Fewer service events mean less downtime and fewer shop hours.
  • Cleaner DPFs reduce the risk of unexpected after-treatment repairs.
  • Simplified inventory, which cuts down on clutter and lubricant errors in mixed fleets.
  • Improved fuel efficiency comes naturally when emissions systems run clean.

Implementation Tips: What to Do Next
Switching oils isn’t just a product swap. It’s a chance to make your entire fleet more efficient. Here’s how to do it right, with help from Greg’s Petroleum’s oil analysis program.

  1. Start with OEM approvals.
    Confirm that your engine manufacturers have approved Delo 600 ADF for your diesel or gasoline engines. This keeps you aligned with warranty requirements and performance standards.
  2. Build your oil analysis baseline.
    Before switching, use Greg’s Petroleum oil analysis program to create a performance snapshot of your current oil. Measure wear metals, contamination, soot levels, and drain intervals to build a baseline for comparison.
  3. Run a pilot program.
    Choose a few high-mileage or high-load vehicles to test Delo 600 ADF. Track results through regular oil analysis to see how engine wear, fuel efficiency, and DPF performance improve over time.
  4. Simplify inventory and logistics.
    If your fleet runs multiple fuels or engine types, Greg’s Petroleum can help you consolidate lubricants and streamline your supply and storage systems for easier maintenance management.
  5. Refine your maintenance schedules.
    Use the data from your oil analysis reports to fine-tune maintenance intervals. Extended drain periods, fewer DPF cleanings, and reduced downtime all add up to more productive fleet hours.
  6. Use oil analysis reports as your roadmap.
    With regular reporting, Greg’s Petroleum’s oil analysis program builds a complete data history for every vehicle in your fleet. Over time, this history helps you anticipate wear patterns, plan service proactively, and make informed maintenance decisions that reduce surprises and costs.

How Greg’s Petroleum Supports Your Transition
At Greg’s Petroleum, we do more than deliver oil. We partner with you to optimize your fuel and lubricant strategy. We can help you:

  • Review your lubricant program and identify cost-saving opportunities.
  • Implement proactive maintenance practices such as oil analysis.
  • Streamline your lubricant logistics for mixed fleets.

With a strategic approach, you’ll get more than a product. You’ll gain a plan to improve performance and reduce costs over time.

Looking Ahead
Lubricant technology is advancing quickly. As engines grow more complex and emissions regulations tighten, choosing the right oil becomes a strategic decision, not a routine one. Chevron’s Delo 600 ADF offers a proven way to extend oil life, protect after-treatment systems, and keep your fleet running cleaner and longer. If you’re reviewing your maintenance and budget plan for 2026, now is the time to evaluate your lubricant strategy with Greg’s Petroleum Service, your Chevron Lubricants Supplier.