6.4 fuel in oil?

scagmanf350 · #1 (**permalink**) 12-09-2012, 05:40 PM

How common is this problem in the 6.4? Read about it in diesel power magazine and there happens to be a 6.4 reasonable priced in my area but oil dilution is very worry some for me. Is the specific to particular year or build date? Is there anyway to fix or prevent this from happening? Lots of questions which makes me rethink even buying one but wanted to hear some feed back from you guys.

44magnum · #2 (**permalink**) 12-09-2012, 05:48 PM

Yes its common, its caused by the DPF, at the end of the combustion cycle fuel is injected (which isn't burnt in the cylinder, for the most part, as it is meant to burn when it reaches the DPF). That's why its important to change oil as directed when running then stock. The best way to cure or prevent this issue is to do a DPF delete and install aftermarket tuning. Its a trait of all truck that are equipped with a DPF, not just ford.

strokinpower · #3 (**permalink**) 12-09-2012, 05:55 PM

When my 6.4 was stock at 4k miles my oil was 5% diesel fuel.

scagmanf350 · #4 (**permalink**) 12-09-2012, 06:56 PM

So if you delete the dpf you no longer fire fuel during the combustion cycle correct?

44magnum · #5 (**permalink**) 12-09-2012, 07:17 PM

Yes there will be no more post combustion injections of fuel after you delete and tune.

On a side note before I deleted, my last oil change (with 5500 miles on it) had 2.5% fuel, my first oil change immediately after I deleted (with 10K miles on it) had 0.5% fuel.