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What happens if petrol is put in a diesel car?

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βˆ™ 2013-09-21 17:06:54

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There are a few different views on what happens if petrol is put into a diesel car, ranging from "this is horrible and will ruin the engine" through "if diesel is put in a petrol engine, it will run but misfire" and "it does depend on the make and model of the car" to, most commonly "petrol will kill a diesel engine; don't start it, have it towed to your mechanic, and have him drain the tank and the fuel lines."

Modern diesel engines use the diesel fuel as lubricant for the high pressure pump. The engine itself will run on petrol but it is only a short period of time before the pump is damaged. Petrol is a poor lubricant in comparison to diesel fuel. Generally when this happens the entire fuel system needs to be flushed to remove the petrol and the metal debris from the damaged high pressure pump, then the pump and any other damaged components need to be changed.

Additional damage can also come from pre-detonation; diesel engines run far higher compression ratios than petrol engines, this is due to, in a simplified manner, diesel being less volatile than petrol. The effect is that the petrol/air mix may detonate 'early' i.e as the piston is rising during the compression phase, before the normal ignition and combustion phase. This essentially forces the piston to go back down early and attempts to turn the engine over in reverse. The huge additional forces generated can and almost certainly will be catastrophic for most internal components.

Given the huge potential for damage to your car's engine, it might be annoying but it makes sense to have the car towed or transported to a garage, to have the tank drained and then for the system to be checked through by a mechanic.

2013-09-21 17:06:54
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Q: What happens if petrol is put in a diesel car?
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Is it bad to put petrol in a diesel car?

Yes, petrol/gasoline will severely damage a diesel engine.

What happens if you accidentally put in petrol instead of diesel?

If you put petrol in a diesel vehicle do not start the engine. Petrol will do serious damage to a diesel engine. You must drain all the petrol out and flush the fuel lines.

What happen if diesel put in the petrol car?

Car will run poorly if at all.

Accidentally put diesel in petrol car?

Have it drained out and change filters

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Can you put diesel oil in a petrol car?

Some oils can be used in both petrol and diesel engines. If it states diesel oil on the container it is not recommended as some diesel oils contain detergent.

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It will dirty the injectors a bit and run very rough,if at all. Still, not as bad as putting petrol into a diesel engine .

Can you put petrol in a diesel car?

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Why is it harmful to put petrol in a car engine?

Who told you it is harmful? It is only harmful if it is a Diesel engine. If it is a petrol (gasoline) engine then Petrol is what it takes to run.

Is petrol is used in diesel cars?

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Is Diesel engine oil bad for a petrol car?

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You avoid it by looking carefully at the fuel pump and making darn sure you are using the diesel nozzle which is larger than a petrol nozzle.

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What happens if you put 2 liters of petrol in diesel engine with 20 liters diesel?

I would recommend not running the engine until the fuel is drained. Any amount of petrol/gasoline in a diesel can cause engine or fuel system damage.

What happens if diesel is put in a petrol car?

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What sort of petrol do you put in a car?

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Can you put diesel in to petrol engine?

Not if you want it to run.

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The petrol engine will just not run. No damage will be done. You will need to drain the tank, flush the fuel lines, and replace the fuel filter.