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Petrol in a diesel, what's your view?

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Well, had a word with him this morning and he's decided to go with it. I've told him the risks but as he says, the guy is straight enough and after all he (the dealer) didn't really have to mention the mis fuel.

 

Grandson has taken out a 2 year extended warranty with 'Autoguard'?. He's come to an agreement that if there is a fault that they don't cover, the garage will 'help him out with it'.

 

Just to mention Grandson has a clapped out Corsa 1.0 with 120K on the clock and the dealer has given him £350  so he's only parting with £700 cash which I thought was not a bad deal and he doesn't stand to lose a lot (so long as the Mondeo is good for a while that is).

 

As for the mis fuel. My concerns are as stated by some, there may have been a period of lack of diesel lube on the pump and at the injectors, but it goes back to how much pure petrol went through and how long the engine was run and those are the factors I don't have.

If a fault arises and is blamed on the misfuel I doubt very much that the warranty co will cover it as they will site it being a known pre existing fault. My V50 has a similar engine and now at 5.5yrs and 107000m has been fine I put about £10 of petrol in before realising my error and filling on top with derv. This was when the car was young. There has never been an issue with the engine. Sounds as if the dealer has been decent and open, most would not disclose the fact. There must be a huge number of cars that have been misfuelled in this country.

Get garage start car-up and perhaps go for a little run.

Cost of car is not relevant but a dead engine destroyed by incorrect fuel is !!!!!!!

  • Author

Get garage start car-up and perhaps go for a little run.

Cost of car is not relevant but a dead engine destroyed by incorrect fuel is !!!!!!!

Well cost is relevant insofar as he is risking it when buying this car, there is no doubt about that and he's far better 'risking it' with a £1000 spend than a £5000 spend.

 

I've advised him to take it for a 1 hour run and to watch the on board warning lights and see how it performs. When he's had the car a while I'll report back on here with an update, i'ts always good to know how these things develop.

I think it'll be fine. The 2.0 TDCi or PSA as it's known in peugeot/citroens and volvos are good engines. My mazda has just thrown up a timing chain stretch error, I'll happily take the mondeo and he can take the mazda! Ha ha.

TDCI injector faults invariably start with a misfire at cold idle, leading to injector sticking open at random times. When that happens, multiple fault codes are logged reading massive pressure loss on the rail, specific injector faults, and loads of white smoke out the back end. If this happens often then the dump of diesel into the cylinder will semihydrolock the piston and bend the conrods (worst case). If it starts and runs smoothly at cold start with no smoke out the back then that's a good starting point, but make sure it's a genuine cold start and the car hasn't been started half an hour beforehand and run for a few minutes as this will mask the problem.

depends how much and how far driven but more often than not mis-fueling with petrol into a diesel is not a major problem.

 

In fact in a really cold spell a few years ago we deliberately put petrol into tractors to reduce problems with diesel freezing ( a pint to the gallon)

  • Author

TDCI injector faults invariably start with a misfire at cold idle, leading to injector sticking open at random times. When that happens, multiple fault codes are logged reading massive pressure loss on the rail, specific injector faults, and loads of white smoke out the back end. If this happens often then the dump of diesel into the cylinder will semihydrolock the piston and bend the conrods (worst case). If it starts and runs smoothly at cold start with no smoke out the back then that's a good starting point, but make sure it's a genuine cold start and the car hasn't been started half an hour beforehand and run for a few minutes as this will mask the problem.

 

Good points. He picks the car up on Thursday but before he hands over the cash I'll get him to ask to look at the engine and feel to make sure it's cold. He can then stand behind while the dealer starts it and look for smoke. After that he'll take the car for a long test run just to make sure it drives okay.

 

He has obviously fallen in love with the car but I'll try to make sure he's not too blinded by his passion :giggle:

All the people saying petrol in diesel is fine and people used to it deliberately have very little to say that is relevant to modern engines. As said by others, modern diesels have very expensive and delicate high pressure pumps and injectors, which the old tractors did not. Hell, even the 1.9 PD lubricated the injectors using engine oil, not diesel, as the common rails do.

Well My brother put a tank of petrol in his 08 plate V50 no problems ever, although Volvo tried to tell him they wanted £1500 to clean it. I always put 15% petrol in my 04 plate or older diesels that I run on WVO, as do about a million people I know, one of which has an 07 plate 335d MSport BMW. The Fluorosilicone gaskets used in engines are just as resistive to petrol as they are diesel, and the only thing I have witnessed is the petrol cleaning the pipes of the diesels and blocking the fuel filter. MAYBE the black rubber hoses (if any are on the cars) that carry the fuel might degrade slightly while they have petrol in them, but this will only be when petrol is in them and will all stop when diesel goes back to them.

 

I think its naeve owners who believe things get damaged when they put the wrong fuel in and panic.

  • Author

Well My brother put a tank of petrol in his 08 plate V50 no problems ever, although Volvo tried to tell him they wanted £1500 to clean it. I always put 15% petrol in my 04 plate or older diesels that I run on WVO, as do about a million people I know, one of which has an 07 plate 335d MSport BMW. The Fluorosilicone gaskets used in engines are just as resistive to petrol as they are diesel, and the only thing I have witnessed is the petrol cleaning the pipes of the diesels and blocking the fuel filter. MAYBE the black rubber hoses (if any are on the cars) that carry the fuel might degrade slightly while they have petrol in them, but this will only be when petrol is in them and will all stop when diesel goes back to them.

 

I think its naeve owners who believe things get damaged when they put the wrong fuel in and panic.

 

 

 

 

 

 

 

 

 

Cheers mate, 

 

from the amount of people that have replied with similar experiences to you it is clear that many have misfuelled and get away with it. I suppose many diesels have been abused by people using 'chip shop fat' etc.,but they seem to keep plodding on ;)

Edited by horkin

There are some really good groups on FB for owners of Mondeos, fantastic for spares and picking up extra bits and pieces as well as advice. Similar to Briskoda in that they are a good bunch,

 

Ford Enthusiasts North and South.

Mondeo Enthusiasts buy sell and swap.

 

I hope he enjoys the car.

I think it'll be fine. The 2.0 TDCi or PSA as it's known in peugeot/citroens and volvos are good engines. My mazda has just thrown up a timing chain stretch error, I'll happily take the mondeo and he can take the mazda! Ha ha.

 

A 2006 Mondeo won't be a PSA engine though. The original 2.0 TDCi 130 engine was Ford's own design until the newer shape Mondeo came out in 2007 with the PSA/Ford 2.0 HDi/TDCi 140.

  • Author

Update:

 

We ARE having fun....Not! :notme:

 

It seems all the help and advice I passed on to my Grandson fell on deaf ears. Not that he deliberately ignores me, he's a sensible lad with his own business, a hard worker but doesn't have time for anything these days.

 

He picked the car up yesterday (Thurs), paid the guy and never took the long test run I advised him to. He got 10 miles up the road when the engine management light came on and shortly afterwards the car just cut out, lit up like a Christmas tree then all lights went out and it was dead.

He tried to re start it but nothing, wouldn't even turn over.

The guy from the dealers came straight out to him, got in the car and it started first time with no warning lights whatsoever. He was very apologetic and promised him he would 'get to the bottom of the problem. The car smoked quite heavily from the exhaust as he drove away.

 

So, having failed to heed my advice, the first thing he did (as Grandsons do!) he rang me in a panic.

 

After he explained to me what had happened I advised him to get his money back and look elsewhere. BUT....

 

The guy at the Dealers has been in touch and assured him he will check everything which earlier I had voiced my concerns about. Injectors, Diesel pump, Cat' and Valves and said to my Grandson, I'll make sure everything is fine even if I have to fit a 'new' engine.

 

It gets even better. Apparently this dealer has already fitted a new clutch, swapped the turbo and fitted a new DMF! All this came out in conversation with my GS as we discussed it.

 

The conclusion is that the dealer is to be given 'one last chance' to fix the car and has been told that if this is not done successfully a refund will be demanded.

 

To be continued...........

Surely the dealer would be losing money on the car if he did all those parts to it?

  • Author

Surely the dealer would be losing money on the car if he did all those parts to it?

 

 

Exactly. I'm wondering if he has it wrong and that the previous owner had work done.

 

He's now going to fit a set of Injectors so if he's not out of pocket he won't be making anything on this one.

That's an expensive outlay,I think about 500 quid or so, it was done on the st I bought, hmm me thinks thinks the mondeo is a lemon?

  • Author

He got a call, car ready today and was able to pick it up. Had a word with the 2 mechanics who'd worked on it and they say it's fine. 

 

GS brought it to show me, it's a really nice car, just remains to see how it performs. Certainly runs and sounds spot on.

 

Well see how it is with a few more miles on..time will tell.

  • 2 weeks later...

If the Mondeo has had new clutch etc, then assuming it works well now, that's a pretty good deal. My last car was a Mondeo 2.2 TD ran it to 80,000 miles, it did smoke a bit when you accelerated but it was a good car.

The car before that a Peugeot 406 2 litre HDi had some petrol put in it once by my father. He realised and topped the tank up with diesel, car smoked a lot and ran rough for a while but strangely enough after that it seemed to run better than it ever had before, one time I got a thousand miles out of a tank of fuel on a holiday in the Highlands, pretty remarkable with that car!

Don't think I'd care to repeat the misfuelling with my current car, somehow I don't think that the newer diesel engines would be quite as forgiving as that old Peugeot engine was!

  • 2 weeks later...

That age mondeo will be running the delphi system which when I was working for the local delphi service agent had a fairly high failure rate. Don't know where in the country you are but parkinsons will do oe spec service exchange for 135 +vat exchange each. They will need the numbers of your old ones though as there were several different injectors fitted. Misfuelling used to be the greatest percentage of failure with these injectors. Depending on the amount it's had in they can sometimes need a full system change including rail, high pressure pump, tank and fuel/ return lines. Sorry to sound like a bringer of doom and gloom.... Merry Christmas!

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