Petrol in a Diesel Jaguar? How Each Tank Compares
Anyone who has got petrol in a diesel Jaguar wants to know the size of the tank on their car, because that settles how much petrol is now in that mixture. Our page gives the fuel tank sizes across the diesel Jaguar range, and each model gets a page of its own, linked further down.
Leaving the motor off and phoning Petrol in Diesel is the advice after the mistake, whatever the size is, and we will then empty the car where it is.
What every diesel Jaguar takes in its tank
The smallest tank in the diesel Jaguar range holds 61 litres and the biggest holds 85, and where yours falls depends on its model and version.
Up to 70 litres fits into the tank on the S-Type.
Between them, the 4 diesel Jaguar models we cover come in 16 versions, and the page for each model gives the tank for every one.
Does a tiny amount of wrong fuel in your Jaguar count?
Wrong fuel in your Jaguar mixes with whatever diesel was still in the tank, so the proportion that's petrol depends on how full it was when you filled up. When a few litres of petrol go into a tank sitting close to empty, they form much more of what the motor would draw. On top of a nearly full tank of up to 85 litres, the same volume is just a minor share of the total.
People commonly ask how much petrol counts as too much. It's more helpful to check whether the engine has run, because a running engine is what pulls that mixture from the tank and pushes it through the pump to the fuel injectors.
A drain is usually all the vehicle requires when the amount is modest.
Engine options in the diesel Jaguar range
The smallest unit in the range is 2.0 litres and the biggest is 3.0 litres.
We can tell which one you drive from the model name and the badging on the back, so check them before you call. Phone even when you're not certain, as we'll work it out with you over the phone.
When there is AdBlue in a diesel Jaguar
Fuel tank size doesn't help with AdBlue. The fuel pump takes its fuel from the bottom of the tank, and that's where AdBlue settles, so even a tiny volume reaches your fuel line. If you have got AdBlue in a diesel Jaguar, the diesel around it does not weaken it, since AdBlue is largely water and doesn't mix with it.
Nothing in AdBlue burns, and the fuel pump gets no protection from it. Once its water evaporates, urea is left in the lines and the fuel filter as crystals.
On a diesel vehicle that has a separate AdBlue tank, the AdBlue filler is often alongside the diesel one under the same flap. Its cap is blue, and it takes a narrower nozzle.
Fuel drain on your Jaguar
A fuel drain on your Jaguar empties the entire tank, however big it is on your model, and it is done where the vehicle is parked. Clean diesel goes in after the contaminated fuel is pumped out and the lines and the filter are flushed, and then the fuel system is primed and the motor started.
After we finish this drain, the car is ready to drive away on fresh diesel.
Clearing the tank: AdBlue removal from a diesel Jaguar
With AdBlue lying at the base of the tank instead of being mixed in, AdBlue removal from a diesel Jaguar begins by emptying the tank fully. Where the engine has run, the lines and the filter are purged through as well, and the fuel filter is changed if needed.
What this covers is AdBlue that has ended up in the diesel tank, not removing or switching off the AdBlue system on the vehicle.
Fuel drain on a diesel Jaguar: what changes the price
The same model can mean very different call-outs, which is why we do not publish a fixed price. The largest factor is whether anyone has started or driven your car. Then there is the quantity that was put in compared with how big your tank is, which liquid it was, and where your car is at the moment. Ring with those details and we can tell you what the job will need.
Questions on your tank and petrol in a diesel Jaguar
What diesel Jaguar car has the biggest fuel tank?
Our figures put the largest fuel tank on the XJ, which holds up to 85 litres, and the smallest on the X-Type.
Is petrol less of a worry in a bigger tank?
The petrol is still there in a bigger tank, and still reaches the fuel pump when your engine runs, even though a few litres form less of the whole. With the car turned off, a fuel drain clears all of it.
Which page shows the tank for my exact version?
Each version we have data for is listed alongside its tank on the page for your car, which is listed further down.
Which fuels, other than diesel, would be wrong fuel in my Jaguar?
It means anything put into the diesel tank that is not diesel, so petrol of any type, including super unleaded, or AdBlue, which has its own dedicated tank.