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Stan
Stan, Mercedes Technician
Category: Mercedes
Satisfied Customers: 3526
Experience:  Technical support engineer
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Got a 2008'Sprinter 313 and it's getting fuel in the oil.

Customer Question

Hi, got a 2008'Sprinter 313 and it's getting fuel in the oil. Had the injectors done as they were knackered but it's still doing it. Just been told there's a MB software update for older Sprinters that cures this, is that right!
Submitted: 2 years ago.
Category: Mercedes
Expert:  Stan replied 2 years ago.
Hello,
Usually the problem is caused by diesel particulate filter regeneration not being completed in city traffic. So one of the MB's suggestions is to drive on motorway at 2000-2500rpm for 50-100 kms once a week.
There are engine control unit updated softwares to optimize the regeneration for some vehicle. Workshops with Star Diagnosis computers can check if it is available for your vehicle and can upload it. It might take 1 hour to do that.
Best Regards,
Stan
Customer: replied 2 years ago.
Stan, the van is engaged in Long Distance European work, it doesn't spend much time in city traffic
Expert:  Stan replied 2 years ago.
Ok, i see.
Almost all of the problems were with the city traffic vehicles, that is why i had to mention it.
DPF regeneration should be checked with Star as well as software updates.
It will be possible to see how often the van regenerates. Possibly the DPF itself is bad or one of the sensors are not working properly (DPF pressure difference sensor for example).
Customer: replied 2 years ago.
Ok, the van is booked in at MB Milton Keynes tomorrow to be checked. When the DPF regenerates in heavy traffic, when I accelerate away it puts out a large quantity of white smoke for about 10-15 seconds then clears. Also fuel consumption is more than normal.
Customer: replied 2 years ago.
Would a faulty DPF cause the fuel to be put into the oil?!
Expert:  Stan replied 2 years ago.
Yes it can- DPF will be regenerated almost every drive, which will not allow for the fuel to be evaporated from oil fast enough. Every regen will cause fuel to get into the oil, but if this happens rarely as it should- it will evaporate completely long before the next cycle begins.