No Roy not an issue but the original engine was a Napier petrol engine, it didn't work. The next was a Wolesley which was also petrol. In 1922 3170 was given a new petrol engine (possibly from a tank). So of the four engines used ( or six if you count the two vehicles) only the current one used in 3170 is a diesel. So unless you are running a preserved era layout it should be a petrol engine.
I don't care if it is pressing one button or typing the Gettysburg Address on your NCE, the default should in my opinion be a petrol engine.