[alancalverd (OP)]

Having once filled a diesel car tank with petrol, I'm inclined to think otherwise.  The car drove for about a mile then simply stopped when sufficient petrol had reached the injectors to prevent compression-ignition. I was advised by the kindly recovery service to flush the system with some special goop before refilling with diesel because the injector pump relies on the lubricating properties of diesel and can be damaged if it  runs with a significant proportion of petrol  in the fluid.

Conversely putting diesel into a petrol car doesn't work because it doesn't vaporise quickly enough to provide a flammable gas.

However BC's question was whether you could use JETA1 in a diesel car. Given that tractors (certainly old ones) run OK on domestic kerosene I think the answer is "probably , but not very well".

[Petrochemicals]

Id guess the petrol would damage the diesel engine , but the diesel would only dirty the petrol due to lack of ignition, providing you didn't turn it over enough to get hydro lock on the cylinder.