Extremwert der Leerlaufruheregelung auf einem Zyl. vom AFB!? | Posts 16+

Here's the translation:

"I have a quick question about the tip of adding large amounts of motor oil to diesel fuel. Wouldn't that be dangerous for the catalytic converter (or, in newer TDIs, the DPF)?"

"The VP37 diesel engine won't be significantly affected. The VP44, PD (common rail), and CR (common rail) engines, with or without DPF (diesel particulate filter), will not be impacted at all. However, CR engines can sometimes experience issues if they are fueled with low-quality regular diesel. Furthermore, you likely won't pass the emissions test (ASU) with a Euro 4 standard."

Engine oil, specifically the type for four-stroke engines, should not be used due to its high ash content. If you want to make it easier on your pump and potentially extend its lifespan, you can add two-stroke oil in a ratio of approximately 1:200.

It's not that I intended to do it, but I remember this happening with older Mercedes-Benz diesel engines, when gasoline was accidentally put in the tank.