What happens if you put gas in the oil fill of a riding lawnmower?

If you put gas in the oil fill of a riding lawnmower, it can contaminate the oil, leading to improper lubrication of the engine components. This can cause increased wear or even severe damage to the engine over time. Additionally, the gas can cause the oil to break down, leading to potential engine failure. It's crucial to drain the contaminated oil and replace it with the correct oil to prevent further issues.