Synthetic Oil vs. Conventional Oil

Conventional oil is refined from crude oil and contains a mix of molecules of varying sizes. Synthetic oil is manufactured to have a uniform molecular structure and is blended with advanced additives. That engineered base means synthetic oil resists oxidation, flows more predictably in cold weather, and forms fewer deposits over time.

For modern engines and high-performance models, synthetics deliver steadier protection across temperature extremes and under heavier loads.

Synthetic oil usually costs more per change than conventional oil. However, because synthetics break down less and keep engines cleaner, they can often stretch service intervals and reduce long-term maintenance costs. If you put a lot of highway miles on your vehicle or keep a car for many years, the slightly higher upfront cost can pay off through longer engine life and fewer visits to the shop.

Synthetic blends are a middle ground — better protection than straight conventional oil at a lower price than full synthetic.

New England drivers face salty roads, cold starts, and stop-and-go traffic. Synthetic oil improves cold-start pumpability, protecting engine parts during the first crucial seconds after ignition. It also resists thinning under high heat, which helps during summer towing or heavy traffic.^*

Many newer INFINITI and premium vehicles come factory-filled with full synthetic oil because manufacturers expect better, more consistent protection.

Follow your vehicle manufacturer’s recommendation first when you choose between synthetic and conventional oil. A mechanic can advise whether switching to full synthetic makes sense for older cars with known leaks.

Full synthetic is often the recommended choice for drivers who want the best protection, frequent highway commuters, and those who live through harsh winters. If you’re balancing cost and improved protection, consider a synthetic blend.