and the winner is…………………. Mercedes 320 CDI !!! commonly used in the E class from 95 to 2002, technically known as the 24 valve 6 pot “OM613″
These diesels are so rock hard – they could probably run on straight petrol!
I know this better than most since I own one, and have “recycled” mixed fuel into it, it drives perfectly and has done for 15.000 miles on contaminated fuel.
The downside is the exhuast smells funny, it doesn’t like starting on cold mornings and 4 out of the 6 injectors are not operating as they should which causes over-fuelling, not that Ime too botherd since overfuelling manifests itself in increased fuel consumption.
Anyone who knows that model of mercedes will be familier with the rust they suffer and mine is no different so I am happy to sacrifice it for a long term wrong fuel experiment.
I took it into a local mercedes specialist and to his credit he knew it had been run on “wrong fuel” within a couple of minutes, and it had finaly started to succumb to the bad fuel.
The car is still going strong and I suspect it may do so for a long time to come.
The long term effect of running a car for 15.000 miles on wrong fuel are
1) fuel economy dropped from 45 overall mpg to 35.
2) cold starting problems (can of easy start a month)
3) reads an error code if booted hard, fixed by turning off then on
4) 4 out of 6 injectors now playing up (note that some dealers try and say injectors are destroyed as soon as a car has been misfueld)
5) smokes on starting (white)
6) smell of burnt metal from exhuast
7) noise of gas (petrol fumes) gushing out when fuel cap opend
Failed an emission test (fixed with a dose of magic sauce)
9) 1 egr valve burnt to a crisp
I decided to run the car on mixed fuel to try and save a few pennies and also some of the mixed fuel batches we get are mostly diesel and it seemed to good to throw away, I have run the car on as much as 35% petrol and 65% diesel (the car is diesel) and have once needed to drain my own tank.
Having said that one of my friends decided to try it on a ford transit and it wouldnt even run on a 10% petrol mix, and I have tried a few other cars that played up on 10% petrol in diesel as well
The car I am using is a high miler e320 cdi, with rust issues, and I would guess it to be worth about 1500 quid so I am happy to take the risk and if the car blows up tomorrow I will be about even between fuel saved and the cost of car including fuel related repairs.
I have seen the other end of the spectrum as well, with as little as 2 litres of petrol the inside of some plastic diesel tanks can turn into soft goo that jams up the fuel system and causes all kinds of woe.
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