Can you use 10w30 oil in mower crankcase?
Yes, you can use 10w30 oil in a mower crankcase. Most lawn mower engines are designed to use a 30-weight oil, and 10w30 oil is a 30-weight oil. The "10w" part of the designation means that the oil flows like a 10-weight oil when it's cold. This makes it easier to start your mower in cold weather, and is ideal for cold temperatures or cold climates. However, if you live in a very hot climate, you may want to consider using a straight 30-weight oil, as it will provide better lubrication at high temperatures.