Tank Sizes and Petrol in a Diesel Hyundai Elantra
How much petrol there currently is in that mix depends on the tank, and so its size is worth checking early on if you have put petrol in a diesel Hyundai Elantra. Each version of the Hyundai Elantra we have data for is listed on this page alongside its fuel tank capacity, and so are the motors it came with.
After it has occurred, the same guidance applies whatever the number happens to be. As soon as you switch the engine off then phone Petrol in Diesel, we'll come and drain your car where it sits.
How each version compares on Hyundai Elantra fuel tank capacity
On the Hyundai Elantra, the fuel tank holds 55 litres, and it's the same on every version we have figures for.
A couple of litres of wrong fuel in your Hyundai Elantra, and what they mean
How full your tank was when you filled up sets the proportion of petrol, as wrong fuel in your Hyundai Elantra mixes with whatever diesel was still there. Up to 55 litres fit into your tank. Filling a nearly full one with a couple of litres of unleaded leaves just a small share of petrol in the total, whereas the same amount in an almost empty tank is far more of what your engine would draw.
The quantity of petrol that is too much is something people often wonder about. The more useful point to know is if your engine has been run, since starting the engine is what takes the blend from your tank and through your pump and your injectors.
Whatever the proportion, the right course is to get it emptied, and with a small amount a fuel drain is normally all your Elantra needs.
Engines used in the diesel Elantra
The engine in your Elantra shows in the version name on the badge. Check it before you call.
The badges on all diesel versions of the Elantra in our figures are CRDi.
Whatever version it is, the motor is 2.0 litres.
Being unsure which version you own doesn't matter. Call all the same, then we'll figure it out with you.
What goes on with AdBlue in a diesel Hyundai Elantra
With AdBlue, tank size works differently. AdBlue is mostly water and does not blend with diesel, and so with AdBlue in a diesel Hyundai Elantra, the diesel surrounding it does nothing to thin it. As it sinks to the bottom of your tank, where the fuel pump pulls from, even a tiny amount reaches the fuel lines.
AdBlue does not burn and gives the pump no lubrication, and as its water dries out, the urea left over crystallises in your lines and the filter and corrodes the metalwork around it.
The filler neck for AdBlue, on diesel cars that have it, often shares a flap with the diesel one and leads to a separate tank. If your Elantra has an AdBlue filler, the diesel pump nozzle is the bigger of the two, and the AdBlue cap is normally blue.
Fuel drain on your Hyundai Elantra
The whole tank is emptied in a fuel drain on your Hyundai Elantra, however big it is in your version, without your car being moved from where it stands. Clean diesel is put in once the contaminated fuel gets pumped out and your fuel lines and the fuel filter are flushed, and then the fuel system is primed and the motor fired up.
It doesn't matter whether your Elantra is still on the station forecourt or left on your drive. You can drive it away after this drain is finished, and it will be running on clean diesel.
AdBlue removal from a diesel Hyundai Elantra, explained
With AdBlue lying at the bottom of the tank rather than blended in, AdBlue removal from a diesel Hyundai Elantra begins by draining your tank fully. If the motor has run, we rinse your lines and the filter through as well and change the filter if it needs it.
AdBlue that has gone into the diesel tank is the subject here. Turning off or taking out the car's AdBlue system is not part of it.
What a fuel drain on the Hyundai Elantra will cost
The same model can mean very different call-outs, which is why we don't publish a fixed price. Whether the Elantra has been run or driven changes it most. After that it depends on how much was put in compared with the fuel tank size, whether petrol or AdBlue got in, and your car's location.
With those facts, we can explain what the job will need when you phone.
Your tank questions on petrol in a diesel Hyundai Elantra
Fuel tank capacity of the Hyundai Elantra: how much does it take?
Each version we have data for shares one tank, and it takes 55 litres.
With a larger tank, is petrol less of an issue?
A bigger tank means a couple of litres make up less of the whole, but that petrol is still in there and still gets to your pump as soon as your engine runs. With your Elantra turned off, a fuel drain clears all of it.
Wrong fuel in my Hyundai Elantra: what does that cover?
Everything apart from diesel in the diesel tank, meaning petrol of every type, super unleaded as well, or AdBlue meant for its own separate tank.
Will you drain the Hyundai Elantra where it is?
There is no need to shift or start the vehicle. Whether it's parked at home or still on the forecourt, we travel to it.