Automakers usually specify a 5W-20 or 5W-30 oil for colder temperatures, with a 10W-30 oil as optional for higher ambient temperatures. These three ratings cover most light-duty vehicles on the road.

However, if your car normally requires the use of 5W-20, it's dangerously low on oil, 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 ...

Automakers including Honda and Toyota are almost exclusively switching from well-known 5W-30 and 10W-30 oils to low-friction, and pricier, 0W-20 synthetic oil. The slippery low-friction oils help ...

Available at: Find locations through amsoil.com Price: $11.50 (U.S.) 10W-30, 5W-20 or even 0W-40. Picking the right viscosity for your engine makes all the difference in the performance and ...

It's acceptable to use 0W-20 engine oil in place of 5W-20 or even 10W-20, since the number preceding the W refers to its low-temperature viscosity. However, you should match the oil grade exactly ...