[ad_1]
For our beloved vehicles, we often err on the side of caution. Many drivers adhere to the traditional six-month oil change schedule, regardless of the distance travelled, and habitually question if we’ve acted too soon when the drained oil doesn’t exhibit a tar-like appearance. My approach, however, has evolved thanks to the findings from Blackstone Laboratories, who assert that vehicle mileage should take precedence over oil age when considering oil changes.
In an informative segment of their podcast Slick Talk: Powered by Blackstone Laboratories, which originally aired in December but has since gained wider attention via platforms like Reddit, the analysts detailed their investigation into oil shelf life. Host Joe Adams discussed how an old bottle of Mobil 1 0W40, nearly 14 years in storage, was rigorously tested after the manufacturer suggested it had degraded.
Test tubes with used motor oil. Blackstone Laboratories
Blackstone’s analysis included various factors such as additive levels, water content, flash point, viscosity, insoluble matter, and the oil’s capability to neutralize acid or base compounds. Remarkably, the long-stored oil still met specifications. Prompted by these findings, the team conducted further tests on other old oils and concluded that genuine oil degradation is largely mileage-dependent.
The investigation included a variety of vehicles, such as a 2020 Ford F-150 with a six-month-old oil fill and a 1996 Lincoln Town Car that hadn’t seen an oil change in five years. Even a diesel-powered 2000 Ford F-350 and a 1995 Porsche 993 with oil over a decade old showed satisfactory test results. The limited number of miles driven played a crucial role in the oil’s maintained condition.
Certain tests did point to increased levels of elements like iron or silicon, which could hint at engine wear, but directly attributing those to the aged oil proved indeterminate given the multiplicity of potential sources.
“Don’t immediately discount old oil; odometer readings should be your guide,” noted Adams in a clear shift away from traditional calendar-based oil change practices.
Nevertheless, not all engines can adhere to a mileage-only regimen. Engines under harsh conditions, including prolonged idling, hefty towing, or motorsports, and those like aircraft with open breather systems may require more frequent oil changes. However, for my regular driving routine, I now prioritize mileage rather than time elapsed since the last oil change.
Have questions or tips for the author? They can be contacted here: james@thedrive.com
[ad_2]
FAQs About Motor Oil Changes
How often should I change my motor oil based on mileage?
While specific recommendations can vary depending on vehicle type and driving conditions, a rule of thumb is to change your oil every 5,000 to 7,500 miles. However, synthetic oils may allow for even longer intervals. Always refer to your vehicle’s owner manual for manufacturer guidelines.
Does motor oil expire if left unused?
Motor oil can remain stable and functional for many years if it is stored properly — sealed and in a temperature-stable environment. The study by Blackstone Laboratories suggests that unopened oil doesn’t necessarily go bad over time as previously thought.
Should I change the oil even if I don’t drive much?
If your car is driven infrequently and accumulates low miles, it is less about the timeline and more about the oil condition and mileage. As the Blackstone Laboratories study indicates, oil with low mileage can still be within specification even after several years.
Conclusion
The traditional stance on motor oil changes has been largely time-based, with many vehicle owners scheduling oil changes semi-annually. However, the comprehensive testing by Blackstone Laboratories provides compelling evidence that the deciding factor for oil changes should be mileage, not age. Understanding that oil can still perform optimally after extended periods provides a new perspective, allowing car owners to make more informed decisions regarding their maintenance routines and potentially reduce unnecessary oil waste. Nonetheless, it remains critical for owners to monitor their specific vehicle’s needs and to consider any severe operational conditions that might necessitate more frequent replacements.
