Petrol into diesel

[GeeJayW]

No ... they're miscible, so they mix and won't separate.

As ever, anything DIY biofuel related on here appears pure 'pub talk'.

Unlike pure pure fatty acids like rapeseed oil which are not miscible with diesel and have poor oxidation stability, poor cold weather properties, don't meet EN590, etc.

Genius!

 

[Headhurts]

I have never as yet (fingers crossed) done this.

Having read these threads and advice I’m sooooo! confused.

I would probably stump up the money for someone to come out.

I hope the op’s car is fine.

Robin


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[Blue30]

I did exactly the same in my 2008 220 cdi a year or two ago it’s been fine since. I looked at the emissions at MOT time and they were actually better than the previous year lol.

 

[chrisk2010]

what is done can't be undone so pointless worrying, hopefully you will be ok or sell the vehicle before any damage surfaces.

Words to live by in these circumstances ..... it does sounds like you've got away with it so enjoy the car and tuck some money aside just in case because you'll more than likely be listening to every noise the engine makes now so having a cash reserve to back you up will relieve some of the worry.

There will now be a bunch of people saying that this is all rubbish and that their mate has been running his diesel on chip fat for years and it's been fine. With modern fuel injection and exhaust after-treatment systems, it is just not clever at all to simply add a litre of rapeseed or another 'cooking oil' type of material to the fuel.

Agree with GeeJay on this ! I have no idea the fuel science of it all but being a ex forklift mechanic I have probably stripped down more forklift engines and fuel systems than i have had hot dinners because some customers mate down the pub had some bio diesel or some diesel (water logged) going cheap and after a few pints probably seemed like a great idea, i have even removed Cat litter from fuel systems because they were trying to turn red diesel into white.

The only people to benifit from this were ourselves and Colchester Fuel Injection where we sent to injectors to be cleaned, tested and sometimes reconditioned or replaced at the extreame.

They seemed to love testing the fuels on their forklifts until we had to completly strip the fuel system and engine apart and clean everything from the fuel tank forward. I vividly remember a couple that smelt very very badly of cooking oil when steam cleaning the fuel tank and to this day i still can't stand the smell and don't own a deep fat fryer.

 

[GeeJayW]

I have never as yet (fingers crossed) done this.

Having read these threads and advice I’m sooooo! confused.

I would probably stump up the money for someone to come out.

I hope the op’s car is fine.

Robin


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I hope he's got away with it too.

An illustration of the problem; When the ultra low sulphur diesel (ULSD) was introduced, a side effect of this was that fuel lubricity was compromised. Some cars went only 15km on ULSD before the fuel pump siezed up. As a consequence, lubricity enhancers were included in the diesel fuel additive packages across the board.

Since then, fuel injection pressures have gone up significantly (more than doubled, and in some cases by a factor of ten!), so the already close tolerances in the pump and injectors have become even tighter.

So the concern from a fuel injection system viewpoint with having gasoline in the diesel is the potential for reduced lubricity. The system components are designed to perform using a fluid with particular properties. Adding gasoline changes the fluid properties which in turn results in the system having operate outside its design parameters. So the potential for damage depends on some unknowns including the tolerance of the system in question and the degree of change.

In practice there is some tolerance, but it's not easy to estimate how much. None of the OEMs will say it's ok to add gasoline to diesel, it would just open up a whole can of worms.

 

[GeeJayW]

I did exactly the same in my 2008 220 cdi a year or two ago it’s been fine since. I looked at the emissions at MOT time and they were actually better than the previous year lol.

Glad you got away with it.
BTW the MoT emissions test only checks for gross emitters, it's not really an emissions test. Certainly not worth paying too much attention to it.

 

[Blue30]

Cheers I was bricking it a bit at the time. I was looking at the particulates specifically which would tell of worn or damaged injectors.

 

[garycat]

Do mercs have anti-siphon devices in the filler? I'd have been tempted to try and manually siphon as much of the petrol as possible with a bit of pipe and something like this - https://www.amazon.co.uk/dp/B06XKHP8Q4/?tag=amazon0e9db-21

 

[E53AMG]

Do mercs have anti-siphon devices in the filler? I'd have been tempted to try and manually siphon as much of the petrol as possible with a bit of pipe and something like this - https://www.amazon.co.uk/dp/B06XKHP8Q4/?tag=amazon0e9db-21

My Jag did plus a wrong fuel detector, it was early in the morning, guess I wasn't fully awake as the unleaded pump kept clicking off and I was forcing it in blaming the pump for being useless, how embarrassing is that admission!

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[Jonc220amg]

Glad you got away with it.
BTW the MoT emissions test only checks for gross emitters, it's not really an emissions test. Certainly not worth paying too much attention to it.[/Q

 

[Jonc220amg]

Hi All

Thank you for all the advice and support.

As of this morning (A cold one) It started on the dot and a smooth 20 min drive to work, I guess only time will tell, I plan to keep it topped to the brim for the next month or so.

Its funny there are so many rumours and split thoughts on the matter, but it would appear, touch wood (Bangs on Head) that it may be possible for the car to run and not die, at the same time this is certainly something that I do not wish to repeat.

Also it would appear there is a gap in the market for a cheap fuel draining company or a redesign on the fuel cap so the petrol one will not fit into diesel,

Or maybe I should invest into some glasses which I think may already be invented.

Thanks again

Jon

 

[GeeJayW]

When the government ban diesels (and later gasoline cars), it'll cease to be a problem anyway. I don't think it's possible to recharge with the wrong type of electrons...

 

[a111r]

Unlike pure pure fatty acids like rapeseed oil which are not miscible with diesel and have poor oxidation stability, poor cold weather properties, don't meet EN590, etc.
Genius!

No need to be sarcastic, when there are some untruths, as emboldened above.
I am also a degree qualified, ex-auto industry engineer and I have made bio-diesel for 10 years.

I'll give you the point about DPFs. But as a one-time dose, that's virtually homeopathic.

 

[markjay]

When the government ban diesels (and later gasoline cars), it'll cease to be a problem anyway. I don't think it's possible to recharge with the wrong type of electrons...

Trying to fill up a Tesla with petrol would be interesting........... fuel, oxygen, and spark.

 

[GeeJayW]

No need to be sarcastic, when there are some untruths, as emboldened above.
I am also a degree qualified, ex-auto industry engineer and I have made bio-diesel for 10 years.

I'll give you the point about DPFs. But as a one-time dose, that's virtually homeopathic.

Perhaps then you could clarify something. If raw fatty acids (rapeseed, vegetable oil, jatropa, olive oil etc.) are suitable blend components for bio diesel, why is it that bio diesel raw materials are processed into FAMEs before being used as blend components?

 

[KeithJG]

My local Shell garage has had pumps updated a few months ago and when you choose or pick up the nozzle a speaker tells you which fuel you are about to use.

So if your batteries are flat in your hearing aid or you need to go to spec savers then be aware of the consequences?

 

[brucemillar]

Yes this is now becoming a feature Shell Garages that may save many a hefty bill. But I suspect that most will actually "not hear" the announcement. I don't and yet it is talking to me. I just ignore it. Familiarity breeds contempt ;^)

 

[E55BOF]

Jon, the damage (if any) is done while the reduced-lubricity fuel mix is being pumped through as the engine is running. Now that the engine is running perfectly normally, there was plainly no significant damage done.

Having done this once is probably the best anti-misfuel reminder you could have. Don't do it again, but don't lose any sleep over it.

 

[Petrol Pete]

Similar, but both ways. Years ago I put £10 of petrol into my almost empty Iveco (1996!) van, drove it for a couple of hundred yards, realised mistake, returned to garage and filled up with diesel = all OK. In fact the van is still going strong. Having said that that old pig will run on almost anything.

Next case,just a few weeks ago. Mother in law somehow managed to put £10 diesel into her petrol Toyota Yaris (on top of quarter tank) she drove a few miles and asked me to look at it. I filled it up with petrol I have been driving it around all week (bit different to my C55 AMG !) and all seems ok so far.

 

[Mattns]

When the government ban diesels (and later gasoline cars), it'll cease to be a problem anyway. I don't think it's possible to recharge with the wrong type of electrons...

In electronics there are Holes and there are Electrons, they are considered to travel in opposite directions