Motor oil comes in various weights, including 5W-30 and 10W-30. But can you substitute one for the other in your car? Here's what you need to know.

Shell Rotella T6 10W-30’s formulation is designed to provide better wear performance compared to conventional and synthetic blend Shell Rotella 15W-40 and 10W-30 products.

With so many options for motor oil, it can be overwhelming finding the perfect option for your vehicle. We go over the details to help you understand which engine oil is best for your car.

Chevron Products Company has announced the introduction of Ursa Super Plus EC SAE 10W-30 motor oil to the United States and Canada. This new heavy duty motor oil is designed to help improve fuel ...

Shell Lubricants has introduced Shell Rotella T6 10W-30 full synthetic heavy-duty engine oil, which provides the benefits of fully synthetic engine oil in the fastest-growing viscosity grade for ...

The rule of thumb is to start with 10W-30 motor oil for crate engines, homebuilt engine projects, and the like. In a hot climate, 10W-40 is a better idea, and 20W-50 motor oil is only necessary in ...

Ever wonder what engine oil weight means? Or the difference between synthetic and conventional oil? Well, wonder no more, because we've got you covered.

New research from Chevron finds you could save as much as 1 percent on your fuel economy simply by switching from a 15W-40 engine oil to a 10W-30 oil.

Cold weather poses significant challenges to engine oils, potentially affecting their performance and ultimately impacting the overall health of the engine.

If an engine isn’t burning or leaking oil, or if it uses, say, less than a quart over 6,000 miles or so, switching to high-mileage oil may not be worth the extra cost for you.

10W-30 and 5W-30 are interchangeable in hot climates, as they are identical once warm. However, owners should stick to the recommended oil in cold weather.