You can do that with old diesel engines but new ones are too sensitive and destroy themselves if you try to run them on anything but diesel.

It mostly because the high pressure pump use the Diesel for lubrication so if you use something else the pump destroy itself sending tiny metal shards down the pipe and into the injectors.

That's why accidentally running a diesel car on gas turn expensive fast. The contrary is much cheaper as just have to flush the fuel lines and you're good to go.