When it’s time for an oil change, you usually see two options: conventional oil and synthetic oil. While synthetic costs more, the question many drivers ask is—why? What exactly makes synthetic oil different, and is the higher price tag really worth it?
Synthetic oil offers several advantages that justify the cost, especially when it comes to engine protection, performance, and longevity. Understanding the differences will help you make a more informed decision about your car.
How Synthetic Oil Is Made
The primary difference between synthetic and conventional oil lies in how each is made. Conventional oil is refined directly from crude petroleum. It contains a mix of molecules of varying sizes, along with impurities that can affect performance over time.
Synthetic oil, on the other hand, is engineered in a lab. It starts with a base of highly refined petroleum or chemically modified compounds, and the molecules are made to be uniform in size and shape. This controlled structure provides better lubrication, higher resistance to breakdown, and fewer deposits inside the engine.
In essence, synthetic oil is built from the ground up to perform better under stress, heat, and time.
Superior Performance in Extreme Conditions
One of the biggest benefits of synthetic oil is its ability to maintain its properties under extreme temperatures. In cold weather, synthetic oil flows more easily at startup, providing immediate lubrication. That means less wear on your engine during the first few moments after you turn the key—when most wear and tear happens.
In high heat, synthetic oil resists thinning and doesn’t break down as quickly. This is especially valuable for turbocharged engines, high-performance vehicles, or drivers who tow, haul, or spend long hours in stop-and-go traffic. The added stability helps the engine stay protected and perform at its best.
Cleaner Engines and Fewer Deposits
Over time, conventional oil can leave behind sludge and varnish that reduces engine efficiency. Synthetic oil is designed to resist these deposits, helping keep internal components cleaner. This translates into better long-term performance and may even extend the life of the engine.
Many synthetic oils also contain advanced detergent additives that help clean existing buildup and prevent new sludge from forming. That means fewer internal problems down the road and potentially lower repair costs.
Longer Intervals Between Oil Changes
Although synthetic oil costs more upfront, it typically lasts longer than conventional oil. Some synthetic blends are rated for up to 7,500 or even 10,000 miles between oil changes, depending on the vehicle and driving conditions. That means fewer trips to the shop and less waste over time.
Fewer oil changes can help offset the higher price per quart, making synthetic oil a more cost-effective option in the long run—especially for drivers who put a lot of miles on their vehicles.
Better Protection for Modern Engines
Today’s engines are built with tighter tolerances and higher efficiency goals. Many are turbocharged, run at higher operating temperatures, or use variable valve timing systems. These advanced designs require better lubrication and heat resistance than conventional oil can provide.
Synthetic oil is designed to meet these demands, which is why many manufacturers now require or recommend synthetic oil in newer models. Using the wrong type of oil could reduce performance or even void a warranty in some cases.
When Conventional Oil Will Still Work
If you drive an older vehicle, use your car infrequently, or only make short trips around town, conventional oil might be sufficient. However, even in these cases, synthetic oil can still provide cleaner operation and better protection, especially if you plan to keep the vehicle long-term.
Some drivers opt for synthetic blends, which combine elements of both types. These offer improved performance over conventional oil at a lower price than full synthetic.
Westside Car Care – Full-Service Oil Changes in Yakima, WA
At Westside Car Care, we help drivers make the right oil choice for their vehicle, driving habits, and budget. Whether your car requires synthetic or you’re considering making the switch, our technicians will explain the benefits and ensure your engine stays protected.
Schedule your next oil change today and keep your vehicle running smoother for longer.