Adding 71 liters of gasoline to a diesel engine

Denis is wrong when he says that petrol would detonate sooner in the compression cycle as that is not where the problem lies. A petrol engine (spark ignition) uses the spark plug to ignite the fuel/air mixture at the correct part of the cycle, but a diesel engine (compression ignition) has a much higher compression so that the fuel ignites as it is injected. Therefore with the injection being at the correct point in the cycle (probably about 5 degrees before TDC) you will not have pre-ignition. The major problem is likely to be with the fuel injectors and pumps as they are designed for diesel fuel rather than petrol, and diesel has different characteristics.

I have never looked into the effects of using petrol instead of diesel, but my guess would be that the fuel injection pumps and the injectors themselves would work after a fashion for a while before they give up the ghost, as the problem would be the petrol would not provide the designed lubrication of the moving parts. I suspect that the pumps and injectors would seize and need to be replaced if they have been used for any time. I am a bit surprised the car managed 14km, though perhaps the driver didn't notice funny noises to begin with. I certainly agree with Denis when he says "Any attempt to drive it would probably cause severe damage"!

Denis is wrong when he says that petrol would detonate sooner in the compression cycle as that is not where the problem lies. A petrol engine (spark ignition) uses the spark plug to ignite the fuel/air mixture at the correct part of the cycle, but a diesel engine (compression ignition) has a much higher compression so that the fuel ignites as it is injected. Therefore with the injection being at the correct point in the cycle (probably about 5 degrees before TDC) you will not have pre-ignition. The major problem is likely to be with the fuel injectors and pumps as they are designed for diesel fuel rather than petrol, and diesel has different characteristics.

I have never looked into the effects of using petrol instead of diesel, but my guess would be that the fuel injection pumps and the injectors themselves would work after a fashion for a while before they give up the ghost, as the problem would be the petrol would not provide the designed lubrication of the moving parts. I suspect that the pumps and injectors would seize and need to be replaced if they have been used for any time. I am a bit surprised the car managed 14km, though perhaps the driver didn't notice funny noises to begin with. I certainly agree with Denis when he says "Any attempt to drive it would probably cause severe damage"!