Petrol in a Diesel Peugeot 508: What the Tank Holds
Someone who has got petrol in a diesel Peugeot 508 wants to know the size of its tank early, as that settles how much of what is in there is now petrol. We give the tank for each version of the Peugeot 508 which we have figures for on this page, together with the motors it came with.
Once it has occurred, the same advice applies whatever the figure happens to be. Keep the engine off then call Petrol in Diesel, and we'll come out to empty the car where it sits.
Version by version: Peugeot 508 fuel tank capacity
On the Peugeot 508, the fuel tank takes 72 litres, and it's the same on every version we have data for.
| Version | Fuel tank |
|---|---|
| Peugeot 508 GT HDi 205 | 72 litres |
| Peugeot 508 HDi 110 | 72 litres |
| Peugeot 508 HDi 115 | 72 litres |
| Peugeot 508 HDi 140 | 72 litres |
| Peugeot 508 HDi 165 | 72 litres |
| Peugeot 508 SW GT HDi 205 | 72 litres |
| Peugeot 508 SW HDi 110 | 72 litres |
| Peugeot 508 SW HDi 115 | 72 litres |
| Peugeot 508 SW HDi 140 | 72 litres |
| Peugeot 508 SW HDi 165 | 72 litres |
| Peugeot 508 SW Hybrid4 | 72 litres |
| Peugeot 508 SW RXH | 72 litres |
Wrong fuel in your Peugeot 508: what a couple of litres amounts to
Whatever diesel is already inside your tank blends with the wrong fuel in your Peugeot 508, and how full the tank was when you refuelled decides how much of that mix is petrol. In a tank which holds up to 72 litres, a couple of litres of unleaded added to an almost full tank is a minor share of the total, and the same few litres going into a tank which was close to empty makes up a much greater part of what your engine would pull through.
People commonly ask how much petrol is too much. The more useful point to know is whether the motor has been run, because starting the engine is what carries the blend from your tank and through your pump and your injectors.
Having it emptied is the safe course no matter what the share is. If the volume is modest, your 508 generally needs no more than that.
Which engines the diesel 508 was sold with
When you call, it helps to have checked the badge beforehand, since the name of the version on it tells us which engine your 508 has.
The badges on the diesel versions of the 508 in our data are HDi.
Our figures include SW versions of the 508 too.
Not knowing which version you own doesn't need to stop you. Phone all the same, then we'll figure it out with you.
What happens with AdBlue in a diesel Peugeot 508
AdBlue changes what the capacity of your tank means. With AdBlue in a diesel Peugeot 508, the diesel already inside the tank does not thin it. Being mostly water, AdBlue stays separate from your diesel and settles to the base, which is where the pump pulls from. Even a small amount gets into your fuel line.
As the water in AdBlue dries out, the urea left behind forms crystals in the lines and the fuel filter and attacks the metal next to it, and AdBlue doesn't combust or give your pump any protection either.
The filler neck for AdBlue, on diesel vehicles that carry it, commonly shares a flap with the diesel one and leads to a separate tank. If your 508 has an AdBlue filler, the diesel nozzle is the bigger of the two, and the AdBlue cap is generally blue.
A fuel drain on your Peugeot 508, step by step
A fuel drain on your Peugeot 508 empties the whole tank, whatever its size on your version, and it's carried out where the car is standing. First the contaminated fuel is pumped out, then the filter and fuel lines are cleaned. After refilling with fresh diesel, we re-prime your system and start the motor.
It makes no difference whether your 508 is still at the station forecourt or left on your drive. After we finish this drain, the car is running on clean diesel and ready to drive away.
How AdBlue removal from a diesel Peugeot 508 works
AdBlue gathers at the bottom of the tank instead of mixing in, and so clearing it entirely is the first stage in AdBlue removal from a diesel Peugeot 508. If the motor has run, we rinse your lines and the fuel filter through as well and replace the fuel filter if it needs it.
Removing or turning off the AdBlue system on the car is not what this covers. It is about AdBlue that has gone into your diesel tank.
What a fuel drain on the Peugeot 508 will cost
Two jobs on the same model can be rather dissimilar, so we don't give a fixed price. What changes it most is whether the 508 has been started or driven, and after that how much went in compared with the capacity of your tank, whether it was petrol or AdBlue, and where the car is now.
Those facts are what we need to tell you what this work takes. Call with them ready.
Queries on your tank and petrol in a diesel Peugeot 508
What does the Peugeot 508 fuel tank capacity amount to?
Every version we hold data for shares one tank, and it holds 72 litres.
Is petrol less of a problem in a larger tank?
The petrol is still there in a larger tank, and still reaches the pump when the motor runs, even though a few litres form less of the total. All of it is cleared with a drain, as long as your 508 is switched off.
How many versions of the diesel 508 are in your figures?
Your boot badge shows which of the 12 diesel versions of the 508 in the table above is yours, since we have data for each.
Is it wrong fuel in my Peugeot 508 if it is not diesel?
It means everything put into the diesel tank that is not diesel, and so petrol of any grade, including super unleaded, or AdBlue, which has its own separate tank.
Can you drain the Peugeot 508 wherever it is?
Yes, wherever it is. Sitting at home or still at the pumps, the car remains put and is not started, since we come to it.