What the Tank Holds: Petrol in a Diesel Citroen C6
How much petrol there now is in that blend depends on your tank, and so its capacity is worth finding out early if you've put petrol in a diesel Citroen C6. The tank size and the engines are listed on this page for each Citroen C6 version that we keep data for.
Whatever the figure, the guidance is unchanged now that it has happened. Leave the engine off then ring Petrol in Diesel, and we'll come and empty the car where it stands.
The Citroen C6 fuel tank capacity for each version
The Citroen C6 carries the same diesel tank on every version we hold data for, and that tank holds 72 litres.
| Version | Fuel tank |
|---|---|
| Citroen C6 HDi 170 Biturbo FAP | 72 litres |
| Citroen C6 V6 HDi 205 Biturbo FAP | 72 litres |
| Citroen C6 V6 HDi 240 Biturbo FAP | 72 litres |
Wrong fuel in your Citroen C6: what a few litres amounts to
How full your tank was when you refuelled determines the share of petrol, since wrong fuel in your Citroen C6 mixes with whatever diesel was still in it. Up to 72 litres go in your tank. Filling a nearly full one with a couple of litres of unleaded means only a minor share of petrol in the whole, while the same quantity in an almost empty tank is much more of what the motor would take in.
Frequently, drivers ask at what point the petrol gets to be too much. Whether the motor has been run is the more helpful thing to check. Once it runs, your pump draws that mix from the tank and passes it on to the fuel injectors.
Whatever the proportion, the safe course is to have it drained, and with a small volume a fuel drain is usually all your C6 needs.
Engines fitted to the diesel C6
Before you call, it's worth reading the version name on the badge, as it shows us which engine your C6 has.
Our data give HDi badges on all diesel versions of the C6.
Being unsure which version you own doesn't matter. Phone all the same, and we'll figure it out with you.
Tank size and AdBlue in a diesel Citroen C6
Fuel tank size plays out differently with AdBlue. AdBlue is mostly water and does not blend with diesel, and so with AdBlue in a diesel Citroen C6, your diesel surrounding it does nothing to thin it. Because it sinks to the bottom of your tank, where the fuel pump draws from, even a small volume gets into your fuel lines.
Nothing in AdBlue ignites, and the pump gets no protection from it. After its water dries out, urea is left in the fuel lines and the fuel filter as crystals, and the metalwork next to it is eaten into.
A separate tank with its own filler holds the AdBlue on some diesel vehicles, commonly alongside the filler for diesel under the same fuel flap. Where your C6 has an AdBlue filler, the AdBlue cap is normally blue and fits a narrower pump nozzle than the diesel one.
Fuel drain on your Citroen C6
Done where your car is parked, a fuel drain on your Citroen C6 clears the whole tank, whatever size it is on your version. First the contaminated fuel is pumped out, then the filter and fuel lines are cleaned. After filling up with clean diesel, we prime the fuel system and start your engine.
Parked at home or still at the pumps, your C6 gets the same drain. Clean diesel is what it runs on when this drain is finished, so you can drive it away.
How AdBlue removal from a diesel Citroen C6 works
Emptying your tank completely is how AdBlue removal from a diesel Citroen C6 starts, since AdBlue does not mix in and collects at the bottom instead. Where the engine has been run, the lines and your filter are flushed through as well, and the fuel filter is replaced if needed.
Taking out or disabling the AdBlue system on your car is not what this covers. It's about AdBlue that has got into your diesel tank.
What a fuel drain on the Citroen C6 will cost
Two jobs on the same model can be quite different, and so we do not give a fixed price. How much got in against the size of your tank, petrol or AdBlue, and the car's location all count, but whether the C6 has been driven or just started changes it most.
Those details are what we need to explain what the work involves. Call with them ready.
Tank queries about petrol in a diesel Citroen C6
What does the Citroen C6 fuel tank capacity amount to?
72 litres, with each version we hold data for using the same tank.
With a larger tank, is petrol less of an issue?
Less of the total is petrol when a couple of litres go into a larger tank, but it's still there, and running your engine still takes it to the pump. Leave your C6 switched off and emptying it gets all of the petrol out.
Do you cover more than one diesel C6?
Your boot badge shows which of the 3 diesel versions of the C6 in the table above is yours, since we have data for each.
Wrong fuel in my Citroen C6: what does that cover?
Just diesel belongs in the diesel tank. Petrol of every grade, super unleaded included, is wrong fuel, and so is AdBlue, which belongs in a tank of its own.
Wherever the Citroen C6 is, can you drain it?
Yes, we can. We travel to your car, whether it is still at the station forecourt or left on your drive, so it does not need to be shifted or switched on.