Petrol in diesel cars
I put a small amount of petrol in my diesel car will this
If it was only a small amount, it shouldn't cause any problems, just fill it right up with diesel to lessen any effects.
BTW, Welcome to the site
Depends on the amount of petrol and the year of the car. If it is a newer car then it should be drained as petrol can cause damage to the high pressure fuel pump.
This is a more common error than people may think. I did just that about 6 years ago; in my case it was 19 litres before I twigged. I then did not start the engine, but had the car towed to a place where I could drain the tank, and then I used cans to fill up the tank with diesel.
In this age of technology, I cannot understand why cars and garages are not "chipped" to emit a clear warning signal if the wrong fuel nozzle is even offered up to the filler neck.
The answer is probably something like, "blow you Jack; it's no skin off our nose".
Non-acceptance of a nozzle to a fuel pipe is only possible in one direction. Electronic detection would be effective in both directions.
An even less techy solution would be the make the nozzle size and the car filler point, to be of dissimilar sizes, so that, for example, the diesel pimp nozzle would not fit into a petrol car filler cap.
It really depends on the year of your car. Anything with a common rail injection systems is a big no-no if there's petrol in it as it will cause damaged.