Originally Posted By: Heidelberger75
Don't know why the fuel contamination was there but it cleared up for the second uoa. Someone on tdiclub thought the previous owner might have used biodiesel thereby causing it. I bought the car with 16k km and it was a rental so I doubt it had any fuel in it other than the standard German pump diesel. Also, all diesel in Germany is allowed to have up to 7% biodiesel.
Oh yeah, vw does NOT use special breakin oil in the factory fill.
Thanks for the info on the break in oil, I thought they were using a special Fuchs oil. The Bio diesel does not cause fuel contamination (I'm in germany and have never seen any in my UOA) and is good news not bad in cleaning terms. It can result from too much time at idle OR taking the sample without at least 30 mins driving around at full operating temp. If it's not either of those two possibilities then it must have got in the sump when the injectors were fitted or something real odd. UOA looks fine, although the Calcium and Zinc level of the oil you used seems a bit low, if this is a new generation high tech long life that is not so important and like my LM Synthoil it does not contain Moly which has been left behind in technical terms.
Is this Castrol Edge or GTX 5/30?? The fact it held up in viscosity terms makes it look like Edge, BUT the Zn and Ca look more like GTX.
Don't know why the fuel contamination was there but it cleared up for the second uoa. Someone on tdiclub thought the previous owner might have used biodiesel thereby causing it. I bought the car with 16k km and it was a rental so I doubt it had any fuel in it other than the standard German pump diesel. Also, all diesel in Germany is allowed to have up to 7% biodiesel.
Oh yeah, vw does NOT use special breakin oil in the factory fill.
Thanks for the info on the break in oil, I thought they were using a special Fuchs oil. The Bio diesel does not cause fuel contamination (I'm in germany and have never seen any in my UOA) and is good news not bad in cleaning terms. It can result from too much time at idle OR taking the sample without at least 30 mins driving around at full operating temp. If it's not either of those two possibilities then it must have got in the sump when the injectors were fitted or something real odd. UOA looks fine, although the Calcium and Zinc level of the oil you used seems a bit low, if this is a new generation high tech long life that is not so important and like my LM Synthoil it does not contain Moly which has been left behind in technical terms.
Is this Castrol Edge or GTX 5/30?? The fact it held up in viscosity terms makes it look like Edge, BUT the Zn and Ca look more like GTX.
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