To drain or not to drain

[Potty]

Hi All, After advise I have a y61 2012 3 litre CRD, when filling up yesterday I pickup the wrong pump and added 4.75 litres of 91 octane unleaded to my 95 litre tank, so I filled it up with diesel and went in my way, This equates to around less than 5% of the tank.
I'd did some googling and it advises that CRD diesels should be drained Have spoke to four mechanics who are divided, a couple say just keep adding diesel every 100km. Has anyone had this issue. Cheers TIA

[GQtdauto]

Mines not common rail but I stuck in about 20 litres and did what you did just filled it up completely and drove it .
You will need to change your fuel filter though .

[Maxhead]

Personally I wouldn’t stress about it mate.
There have been a few discussions on here on this issue and general consensus is its fine with a few litres of petrol.







................on the road

[Hodge]

4 litres is bugger all.
I'd be adding half a liter of two stroke to it as well.
And just let it run its course.
Should not even feel it.

Sent from Note 5 using TapaPro

[Sir Roofy]

Did it to mine acouple of years ago about the same amount it went really well
once it used it up the truck felt sluggish but no dramas

[threedogs]

wont hurt as others have said but change your fuel filter next fill

[the evil twin]

snip...
I'd did some googling and it advises that CRD diesels should be drained Have spoke to four mechanics who are divided, a couple say just keep adding diesel every 100km.

The reason for the CRD advice is because of the extreme pump and fuel rail pressure for the Common Rail over a Di.
With such a small amount of Unleaded I wouldn't bother draining but keep topping off with Diesel every 20 litres or so for a while as advised.

Unlike Water which will collect in the bottom of the tank and potentially give the engine a gutful... Unleaded is lighter than Diesel so will tend to float.
Therefore it will possibly concentrate as the fuel level gets lower which is why they suggest topping off the fuel at short intervals for a while.
That will keep the Unleaded getting picked up from the tank well and truly diluted as the fuel slops around and it mixes with the Diesel.

[Potty]

Thanks for the input guys 😀

[Dhuck]

Welcome to the forum mate

[4bye4]

G'day mate and welcome to the forum.

[Potty]

Thanks for the welcome and advise have now done around 1000km filling up every 100km all going Ok so far thanks again. Cheers 🍻