Engine oil additives make all sorts of promises about helping your vehicle's motor last longer and increasing your gas mileage. Here's what you need to know.

Using the best engine oil additive can help improve the performance and longevity of your engine in a variety of ways. Most change the viscosity of the engine oil.

Although most engine oil and gasoline varieties work fine on their own, sometimes they could use a little help with an additive.

The Engine Break-in is an important part of your engine's life, and without breaking in an engine, the engine's seals and rings might not mate properly.

The Best Motor Oil for Your Hybrid or Combustion Car in 2025 It doesn't matter if you have a hybrid or conventional gas-powered car, a good motor oil can make the difference between a long-lasting ...

Tiny, perfectly smooth carbon spheres added to motor oil have been shown to reduce friction and wear typically seen in engines by as much as 25 percent, suggesting a similar enhancement in fuel ...

The best synthetic oil products last longer, keep engines cleaner, perform well in all temperatures, and protect your engine.

These best motor oils will help protect your engine and keep it running smoothly all year long, no matter your budget.