[Closed] Water in diesel at Morrisons Boroughbridge

Never heard or thought of this as a problem until 2 months ago. I've only just got my van back from the garage after a mis-fire was diagnosed as contaminated fuel. The van has had the whole fuel system flushed out, 4 new injectors and a new fuel rail. About £3500 worth of work!

I can't prove fault, but I think my contamination was picked up at Asda in Swansea.

Be warned that not all insurance companies will cover contaminated fuel, and mine took bludgeoning, which is why it took so long.

I given up on supermarket fuel and seen a nice increase in mpg since

Many diesel filters have a water trap, with a handy dandy drain plug at the bottom. Connect a pipe and a jar to it, turn and let it drain til the water's out. Should be simple enough, and if your car has a sensor for it I'd expect it to be easy to drain off.

+1 for what molgrips said, then go fill up at a proper petrol station like shell or BP, I've never had decent diesel from a supermarket fill up

Thanks Molgrips, done it and expect may be have to repeat the process until the tank is empty....then no more supermarket fuel.

cheers guys

I've never had decent diesel from a supermarket fill up

Must be time consuming lab testing fuel every time you fill up 😉

Everyone should have a hobby I suppose.

Must be time consuming lab testing fuel every time you fill up

No need to test, might sound geekish but I notice the drop in fuel economy and the engine doesn't respond as well under acceleration when on tesco's or morisson's finest.... Shell on the other hand runs much nicer and I get another 40-50 miles to the tank generally..

I get slightly more to the tank if i replace supermarket fuel with BP ultimate or similar (maybe a few %)

But the increased price cancels out the benefits completely so I just buy from wherever is nearest when the light comes on.

I've been logging usage for ages (company vehicles) and I do massive miles each year, but I've never seen anything that convinces me it makes a difference money wise.

Got to go with premium fuels as as being noticeably better, car was feeling really bad a few weeks ago, re-filled with Shell V-Power Nitro+, and it's back to it's old self.

driving gods, please can someone give us mere mere mortals the correct procedure on parallel parking please? ta.

I thought that water will appear in that little drainy thing on the filter eventually no matter what fuel you used? Isn't diesel hygroscopic?

I live about 300 yards from Morrisons in Boroughbridge, been here 3 years & never had a problem (topped up yesterday) & no noticeable difference in economy on my TDI Passat.
What annoys me is that quite often Morrisons in Harrogate (11 miles away) can be up to 4p a litre cheaper! ❓

Surely it wasn't Morrisons putting water in the diesel? Although it wouldn't surprise me...

I fill up there regularly never had a problem it's my local,

[i]I've never had decent diesel from a supermarket fill up[/i]

Unless you normally fill up with v power or ultimate type fuel then you do realise that the normal stuff supermarkets and petrol stations sell is the same stuff.

[quoteGary_M - Member
I've never had decent diesel from a supermarket fill up

Unless you normally fill up with v power or ultimate type fuel then you do realise that the normal stuff supermarkets and petrol stations sell is the same stuff.

With the exception of additives. Stick with a major brand, they are kinder to the engine, likewise with lubes.

Water activating the sensor is likely to be a cumulative thing, rather than one particular fill-up.

The most likely cause of water in diesel is condensation in the tank. Atmospheric air is sucked in as the diesel is consumed. Humid air will introduce moisture to the tank. Keeping the tank as full as possible keeps this to a minimum.

I used to be a marine engineer and there is a reason why we told all yacht owners to always leave desiel tank full. With temperature changes, condensation builds up in empty tanks. So if your car has been empty ish and stood over night that could of got water in your fuel tank

Water is heavier than diesel and as such if there was a considerable amount of water in your last fill up it would have been apparent sooner (pick up is at bottom of tank) So as troutwresler suggested it is probably a build up over time.

i'm very careful which company I buy my electricity from they all use different power stations

here's a tick list

same refinery yes
same storage depot yes
same delivery co's yes
same tank layout and design yes

someone wee'd in your tank?

i used to give a crap but then as I was doing a lot of miles I filled up wherever I was passing through, 50/50 supermarkets & "Real" petrol stations and the conclusion is there was no discernable difference. Perhaps I wasn't super analytical enough of the exact difference in acceleration as I chugged along in traffic or really cared that much. It's not like I was ever in a situation where seconds mattered.

If the water light came on then it's a decent amount to come through all at once, most likely it was a build up, how often did you check the collection bowl under the filter?

I've never had decent diesel from a supermarket fill up

Conversely, I've never had bad diesel from a supermarket fill up