Change Is Good: Blue Diamond Oil Long-Term Test, Part I

You know the phrase, “In it for the long haul”? Diesels fit that description to a T, and they have to. On long drives and in all kinds of conditions, they’re expected to perform well, and Hot Shot’s Secret made that mission even more apparent when we installed one of their Frantz oil filtration systems, designed with long range and reliability in mind.

Recently, it came time to bring in our 2018 Chevrolet 2500HD in for an oil change. Quickly, we realized we had a unique opportunity on our hands. You might recall that we installed a Frantz oil filtration system on this truck and poured in Blue Diamond PAO oil, which is a full synthetic oil that’s touted as some of the longest-lasting in the market.

It started off with our 2018 Duramax coming in for an oil change. But now, we’re planning on bringing it in again and again – every 5,000 miles – so we can test the Blue Diamond oil that keeps it running!

Given this imposing description, we wanted to see for ourselves just how robust Blue Diamond oil really is. Over the next several months, we’ll be taking a look at the oil over time and see how it maintains its potency as the miles tick by.

Product Background

Let’s go into some more detail, first by examining the oil more closely. To help us learn more about Blue Diamond PAO oil, we spoke with Hot Shot’s Secret’s Technical Director, Aaron Darnell. “Blue Diamond is a high-quality oil meant for applications that have a need for high longevity,” he said.

“Blue Diamond is made from Group IV base oils, which are known as polyalphaolefins, or PAOs for short,” he continued. “Compared to Group I, II, and III base oils, PAOs possess superior characteristics concerning oxidation, volatility, and shear. They are pure, true synthetics, and are well-suited to dealing with extreme temperature changes, both hot and cold.”

Going into more detail on these traits, Darnell shared what made Blue Diamond oil some of the most resilient out there when it comes to oxidation. “As a PAO, Blue Diamond oil has superior oxidation resistance over mineral oils and Group III synthetics,” he said. “This is due to their linear arrangement and lack of aromatic compounds. They’re also fully saturated and therefore protected from oxidation, whereas mineral-based and Group III synthetic oils have points on the hydrocarbon chains that are prone to oxidation.”

For future installments, we'll use oil analysis test kits to analyze the oil's TBN (Total Base Number) and other properties. If required, we have Hot Shot's Secret TBN Booster to restore the oil's constitution.

Another important factor in Blue Diamond oil’s favor is its purity. “Thanks to its high purity levels, Blue Diamond oil has a lower volatility and can work better with additives,” said Darnell. “Lower volatility also means less emissions. They also don’t form crystalline structures thanks to their polymer backbone. In a nutshell, Blue Diamond oil provides longer drain intervals, less wear, less maintenance cost, and cleaner operation.”

Starting Point: Replacing The Oil And Putting On Miles

As stated before, we want to test Blue Diamond oil as time and mileage add on. We’re starting fresh with new oil, new filter media for the Frantz system, and an oil test of the pure Blue Diamond oil to measure against for future analysis tests.

Changing the oil on the truck was pretty straightforward. Underneath, we removed the drain plug and let the oil pour out for several minutes. Once it appeared to be trickling, we went ahead and removed the stock and Frantz filters. We replaced these with their respective filter elements, filled the truck up with Blue Diamond 15W40 oil, and turned the truck back on.

Removing the stock oil filter and used Frantz filter.

This part of the journey is just the starting point. As of now, the truck is putting on miles as the owner goes about his daily routine. We’ll provide another update once the truck reaches 5,000 miles, where we’ll do another oil analysis test. This will give us a clear picture on how the oil is doing. These tests provide for a wide amount of data, showcasing things like Total Base Number, which measures alkaline concentration between the acidic runoff of combustion against the basic properties of oil. Put simply, the higher the TBN, the better off the oil is.

We replaced the oil filters and topped off the oil in the Duramax. We'll see this truck again in 5,000 miles!

As far as predictions go, Darnell offered some interesting thoughts. “The Total Base Number [TBN] will decrease, but it will be hard to guess,” he said. “Heavy pulling, racing, or spirited driving lower the TBN faster than just cruising. Probably the most compelling part of the story is that the viscosity will drop very little, and it will still be in grade, since it’s a PAO.”

However, Darnell cautioned that we may find a false flag in the results regarding oxidation. “Depending on how the lab decides to quantify the results, it’s possible the results will flag for oxidation, but that will be a false reading since our oil has a high ester content for the sake of additives,” he explained. “The part of the spectrum that tests for oxidation also reads esters. So don’t worry if you get results indicating high oxidation. The baseline for oxidation on our Blue Diamond 15W-40 is just above 50.”

With this knowledge in mind and our curiosity stoked, we’re eagerly awaiting more results as the miles tick by. We plan to do tests every 5,000 miles, so stay tuned, as in a few more weeks, we’ll have results for the 5K, 10K, and 15K mileage tests. In the meantime, be sure to visit Hot Shot’s Secret to learn more about Blue Diamond oil and what it can do for your diesel workhorse.

Article Sources

About the author

David Chick

David Chick comes to us ready for adventure. With passions that span clean and fast Corvettes all the way to down and dirty off-road vehicles (just ask him about his dream Jurassic Park Explorer), David's eclectic tastes lend well to his multiple automotive writing passions.
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