C5 X7 Eolys refilling advice

[GavinPJ]

Technically, it should be measured if you want to know how much to buy - 1 or 3 litres, but it should be topped up and then the engine ECU needs the additive counter resetting to Zero after you have topped it up. So buying a few 1 litres may be the solution. This stuff does not keep once opened - so can't be stored once the bottle seal is broken.

Thanks a million Marc. I'll get a litre and see what happens. How big is the tank actually?

[GiveMeABreak]

3 litres generally, but they rarely fill these to capacity at the factory. It depends on engine as to how much they fill them. I'll try and dig it out.

[GavinPJ]

3 litres generally, but they rarely fill these to capacity at the factory. It depends on engine as to how much they fill them. I'll try and dig it out.

Cheers Marc, I'd rather have it full now and be done with it.

[GiveMeABreak]

Ok, so for topping up 1 litre is recommended - generally, if you were replacing the additive tank completely, then you would fill it with the 3 litres.

To work out what you need, the tank can be removed and then tilted forward, but you'll need a set of plugs and all that....

Empty the reservoir into a measuring cylinder (Tilt the tank as in the illustration ).
Measure the quantity of additive and compare with the table below.

Distance covered ( miles )	0	18750	37500	56250
Quantity ( litres )	1,57	1,114	0,658	0.202

So looking at your mileage as an estimate and the guide above - and assuming they default amount filled at factory as per the 0 mileage in the table above is 1.57 litres, you should be able to work out what you've used roughly. So you may be able to get a couple of litres in at least.

[GavinPJ]

Cheers Marc. Dealer has it for €55 a litre.

[GavinPJ]

Result. Dealer charged me €150 to refill it. 1 litre. Recode a new remote and a full service.
He supplied the DPF fluid. I supplied the service parts and the new remote.

[GiveMeABreak]

Bargain!