Common Myths About Diesel Engine Oil Debunked

Common Myths About Diesel Engine Oil Debunked

Jun 8th 2023

In recent years, the science behind diesel engine oil has skyrocketed and improved the functionality of diesel engines across the globe. Despite the massive scientific improvements, many myths and misconceptions about diesel engine oil are still widely accepted and pervasive. These misconceptions make it challenging to separate fact from fiction and choose the right oil for your engine. To set the record straight, let’s review and debunk the most common myths about diesel engine oil.

You Can’t Switch Back From Synthetic

It’s unclear where this myth originated, but one of the most pervasive misconceptions is that you can’t return to conventional oil once you switch to synthetic oil. Not only is this not true, but you should switch your oil throughout the year. During the colder months, synthetic oils contain critical additives that prevent the gel’s viscosity from increasing or gelling. During the warmer months, you can switch back to conventional oil.

High Viscosity Is Better

The lower the viscosity of an oil, the thinner the oil is and the easier it flows through the engine. Conversely, the higher the viscosity, the thicker the oil, the more power the engine needs to push the oil through the engine. While high-viscosity oils have a stronger film surface, this doesn’t mean high-viscosity oil is inherently better for your engine. Using the wrong oil viscosity can cause a lot of damage to your engine, creating more resistance and decreasing fuel efficiency.

You Need an Oil Change Every 3,000 Miles

One of the most common and persistent diesel engine oil myths is the belief that you must change your oil every 3,000 miles. Quick lube companies started in the late 70s and pushed the idea that you need to change your oil this often to keep customers coming back. Today, high-quality engine oils allow you to go up to 10,000 miles before a change. Modern oil-life monitoring systems can tell you when you need an oil change, often far in advance. You can refer to the owner’s manual if you’re unsure when your specific make and model should get an oil change.

Additives Enhance Engine Performance

Manufacturers like to advertise their oil as having performance enhancement abilities, but no engine oil can inherently improve your engine. Additives stabilize your engine oil and help it protect your engine from wear and tear. It can’t improve your gas mileage, add horsepower, or rejuvenate your engine. It can undoubtedly prevent problems from occurring or stop corrosion from getting worse. Still, an oil’s formula isn’t going to improve anything besides the longevity, stability, and performance of the oil itself.

Here at Santie Oil Co., we’re a lubricant wholesaler dedicated to meeting all of your heavy-duty diesel engine oil needs. Shop trusted tried and true brands like Shell Rotella, Citgard, Chevron Delo, and more, all on one easy-to-use website.