Engine oil is vital for protecting a car's engine. If your car requires 5W-20, can you use 5W-30 instead? Here's why those numbers are so important.

Most engine oils have different numbers on their labels. Here is what those numbers mean and if you can use 0W-20 in place of 5W-30.

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NEW YORK (Reuters) -Oil prices were little changed on Wednesday as investors assessed trade developments between the European Union and the U.S. after President Donald Trump reached a tariff deal ...

At the HOT ROD How-To section, you’ll learn how to make improvements to your own special hot rod, drawing from the DIY knowledge of the HOT ROD team to learn more about how-to make more power ...

Like it or not, energy prices — whether petroleum, natural gas or oil — remain incredibly important to the U.S. economy, to businesses and to our readers.

A GMC Sierra owner took his truck in for an oil change and asked the dealer to switch the oil viscosity from 0W-20 to 5W-30 oil. They wouldn't do it unless he signed a waiver confirming his ...