What happens if you mix a little bit of diesel fuel and regular gas into your lawnmower?

It is not recommended to mix diesel fuel and regular gas into your lawnmower, as it can cause engine damage and result in poor performance. Diesel fuel has a higher density and lower volatility than regular gas, so it does not vaporize as easily. This can lead to incomplete combustion, which can damage your engine's pistons, valves, and rings. Additionally, diesel fuel contains a higher percentage of sulfur than regular gas, which can cause corrosion in your engine's fuel system.