What does 5W-30 or 10W-40 actually mean? Here's why knowing your oil grade is important to the health of your engine.

the only motor oil you have available is 5W-30, and you must drive it, it's better to add the 5W-30 than it is to drive your ...

Motor oil labels. These are the labels you'll find ... Automakers usually specify a 5W-20 or 5W-30 oil for colder temperatures, with a 10W-30 oil as optional for higher ambient temperatures.

If you have a diesel engine and want a synthetic oil option ... including commercial trucks and heavy-duty pickup trucks that allow an SAE 5W-30 oil.

Consider the creation process of a conventional 5W-30 motor oil. The petroleum base oil alone may have the properties of an SAE 5 grade oil. This means at extremely low temperatures, it may be ...

There's also weight to consider, which is the viscosity of a motor oil. You'll see this information in a format that looks like 5w30 or something similar. The first number indicates viscosity at ...