Equivalent Substitutes for Mobil Delvac 15W-40

Proper lubrication is crucial for any engine, but it’s especially important for high performance diesel engines. Mobil’s Delvac 15W-40 oils rank among the most trusted products in America when you want protection and performance for your heavy-duty vehicles and equipment. Nevertheless, appropriate substitutions can be made when necessary. An alternative can be useful when your preferred brand is in short supply or overpriced.

Let’s take a quick look at the Mobil Delvac 15W-40 line of engine oils:

1. Mobil Delvac MX 15W-40 (Full Mineral Oil)

This is the entry-level full mineral oil product in the Delvac catalog, intended for use on highway and off-highway diesel vehicles and equipment. It is commonly used in industries including construction, mining, agriculture, and marine, extending engine life by controlling deposit buildup.

2. Mobil Delvac Elite 15W-40 (Synthetic Blend)

This semisynthetic oil (also called a “synthetic blend”) combines the performance advantages of mineral and synthetic oils. It is known for improved low temperature performance and higher resistance to oxidation as compared to mineral oils. This is a common solution deployed in large commercial transportation fleets.

3. Mobil Delvac MX ESP 15W-40 (Full Synthetic Oil)

Mobil Delvac’s full synthetic diesel engine oil is the one to go for when you want to be confident of optimum performance. Recent-generation low-emission diesel engines benefit most from Mobil Delvac synthetic, with noteworthy improvements in fuel economy and engine longevity.

Are There Any Acceptable Equivalents for Mobil Delvac Diesel Engine Oil?

There are several products available that can act as a substitute for Mobil Delvac diesel engine oils.

These include Shell Rotella’s T4 15W-40 (mineral), T5 15W-40 (synthetic blend), and T6 15W-40 (full synthetic) products. To discover more about Mobil Delvac equivalents, just review our Shell vs. Mobil Oil Cross-Reference Guide. It provides a complete list of 24 common Shell Rotella products along with their Mobil equivalents.

Shell Rotella T4 diesel engine oil is one of our bestsellers at Keller-Heartt:

Shell Rotella T4 Triple Protection 15W-40 Heavy Duty Motor Oil - 55 Gallon Drum

While Shell Rotella has the name recognition that makes it a standby choice for many buyers, you can enjoy savings combined with the same reliable high performance through Truegard® oils, Keller-Heartt’s in-house Mobil Delvac equivalent. Our customers rave about the difference Truegard® makes for their engines!

Why More and More Truck Fleets Across the United States Are Switching to  Truegard® 

Truegard® was designed to deliver the engine protection you expect from big names like Mobil and Shell at a better price. Our experienced engineers have evaluated all the popular diesel engine oil products along with today’s emerging diesel engine technologies, ensuring a best-fit solution for modern vehicles.

When you choose to buy directly from Keller-Heartt, you don’t have to pay shipping on most orders. You can save even more by buying in bulk without adding any overhead. And you know that Keller-Heartt will always have the products you need, regardless of how those needs change now or in the future.

We offer the following products directly from our website:

Truegard® 15W40 Motor Oil - 55 Gallon Drum
Truegard® 15W40 Motor Oil - 5 Gallon Pail
Truegard® 15W40 HD SYNTHETIC Motor Oil - 55 Gallon Drum

No matter whether you go with Shell Rotella, Mobil Delvac, or our very own Truegard® diesel engine oil, you can rely on Keller-Heartt for products that get you where you want to go by upholding the highest standards in the industry. Contact us today to learn more about which diesel engine oil is right for you.


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