Internet searches still warn that synthetic oil can cause leaks. However, this statement is outdated and untrue.
Using modern synthetic oils made by leading lubricant makers like Mobil, Kluber and Fuchs doesn’t lead to leaks, but can reveal existing issues in mechanical systems that require immediate attention and improve the condition of serviceable components. Here, we debunk the myth that changing to synthetics can result in leakage, looking at why the misconception came about and what really happens when swaps are made.
How did the synthetic oil leak myth start?
Every untruth has an origin, and it’s the same for the incorrect idea that synthetic oil use results in leaks. When synthetic oil was first introduced, incompatibility issues arose. First generation synthetic lubricants were not formulated to work with the rubber seals installed in older engine models. In the ‘70s and ‘80s, they were mainly ester-based oils that caused rubber seals to shrink and degrade, leading to genuine leaks.
Traditional oil isn’t as clean as synthetic oil and can cause a build-up of deposits that clog holes in seals and gaskets, temporarily blocking hidden leaks. Synthetic oil effectively removes system sludge and reveals the holes in deteriorated parts. When leaks become clear, the new oil is mistakenly blamed.
Synthetic oil also flows easier than conventional oil can. As a result, when a weakness exists, the thinner oil quickly finds an escape point and reveals damage.
What really happens when a leak occurs after synthetic oil usage
Synthetic oil is formulated with superior detergents that dissolve and eradicate sludge disguising a leak. The advanced cleaning action uncovers a pre-existing issue like a cracked gasket or a seal that has become worn or shrunken and is no longer fit for purpose. Put simply, synthetic oil doesn’t damage mechanical components. It simply unmasks problems that are already present, giving operators a clear view of the issue and a heads up to make repairs.
The bottom line on leaks and synthetic oil
If you decide to change to using synthetic oil and discover leaks, the fault lies in your system’s components, not the new oil. Instead of jumping to the conclusion that synthetic oil is not the correct choice for your machinery, replace your outdated seals.
Wherever seals are fitted and whatever they are manufactured from, proper lubrication is critical to optimise performance and service life. Seals and lubricants must be compatible, a goal achieved by choosing products with the right base oils and additive packages that let seals change shape at a slow and controlled rate throughout their lifespan. Seals swell, allowing their material to close any gaps made by wearing or heat damage, mitigating premature leakage.
Lubricants contain conditioners that support seal service life, keeping their materials supple and stopping them from getting brittle and cracked, resulting in a leak risk. For instance, valve seals are designed to block oil from getting inside the cylinder during the first stage of the internal combustion process, called the intake stroke. A seal that has become brittle and dry can permit oil to escape past and be consumed during combustion. Consequently, the engine will consume more oil.
Today, synthetic oils are specially engineered with additives that rejuvenate seals and prevent shrinking. Additionally, modern seals are more advanced, employing the latest elastomer technology to keep them strong but soft.
It’s important to remember that while synthetic oil can help condition seals and other components, they cannot fix a part that has already failed. A proactive approach to mechanical maintenance can highlight small leaks and damaged components that require replacement early, before they become bigger and more expensive problems to resolve.
Are you changing to synthetic oil?
From gear oil to gas engine oil, many lubricants are available formulated with a synthetic or semi-synthetic base oil. While these products are more expensive to purchase than traditional oils, they offer a substantial financial return because of their attributes. Synthetic oil delivers a higher performance, enhanced lubricity and wear protection, system cleanliness, longer active service life and can lengthen the lifespan of the equipment it serves, among many other benefits.
Get supplied with cutting-edge synthetic lubricants for your operation with an order at Oil Store today.
