Adding 71 liters of gasoline to a diesel engine

The pump nozzles for diesel fuel are larger than those for petrol, so a diesel nozzle will not fit to be able to fill a petrol tank, but a petrol nozzle will be able to refuel a diesel vehicle (though it will be a rather loose fit so there are warning signs). The reason for this is that trying to run a petrol engine on diesel means the engine is damaged much more quickly - and probably more comprehensively (i.e. more chance of irreparable damage), while for a diesel engine running on petrol there is more chance of being able to recover the situation, or at least that is the received wisdom. As has been said previously, the problem with petrol in a diesel engine is the accelerated wear so it will continue to operate after a fashion while if it was the other way round I would expect poor fuel/air mixing, potentially incomplete combustion and potential damage to the spark plugs/valves and burning of the cylinder oil film causing lubrication problems (though my mechanical engineering days dealing with diesel engines are 35+ years in the past so this can't be considered an 'expert opinion' at this point).

Direct injection petrol engines work differently from diesel injection, since for a petrol engine the fuel is injected in measured quantities but it is still the spark plug which causes the ignition, but for a diesel engine the air is compressed and then the fuel is injected at high pressure (the engines I dealt with were injecting at about 275 bar) so that the fuel is finely atomised and as the temperature of the compressed air is above the auto-ignition temperature of the fuel it immediately ignites. The pumps and injectors are designed to work with particular fuel characteristics (viscosity, etc.) so if the fuel is changed, this is where the modifications have to be made, and is presumably where the damage occurs when it goes wrong.

The video on the link is interesting and many thanks for providing it, though it doesn't make me want to revise anything I have said previously, as the behaviour of the cars seems to be consistent with my understanding of where the problems are likely to be.

The pump nozzles for diesel fuel are larger than those for petrol, so a diesel nozzle will not fit to be able to fill a petrol tank, but a petrol nozzle will be able to refuel a diesel vehicle (though it will be a rather loose fit so there are warning signs). The reason for this is that trying to run a petrol engine on diesel means the engine is damaged much more quickly - and probably more comprehensively (i.e. more chance of irreparable damage), while for a diesel engine running on petrol there is more chance of being able to recover the situation, or at least that is the received wisdom. As has been said previously, the problem with petrol in a diesel engine is the accelerated wear so it will continue to operate after a fashion while if it was the other way round I would expect poor fuel/air mixing, potentially incomplete combustion and potential damage to the spark plugs/valves and burning of the cylinder oil film causing lubrication problems (though my mechanical engineering days dealing with diesel engines are 35+ years in the past so this can't be considered an 'expert opinion' at this point).

Direct injection petrol engines work differently from diesel injection, since for a petrol engine the fuel is injected in measured quantities but it is still the spark plug which causes the ignition, but for a diesel engine the air is compressed and then the fuel is injected at high pressure (the engines I dealt with were injecting at about 275 bar) so that the fuel is finely atomised and as the temperature of the compressed air is above the auto-ignition temperature of the fuel it immediately ignites. The pumps and injectors are designed to work with particular fuel characteristics (viscosity, etc.) so if the fuel is changed, this is where the modifications have to be made, and is presumably where the damage occurs when it goes wrong.

The video on the link is interesting and many thanks for providing it, though it doesn't make me want to revise anything I have said previously, as the behaviour of the cars seems to be consistent with my understanding of where the problems are likely to be.