I know that there was a poll done for what brands of oil people here at mercedesshop use. Mobil and Castrol were the top 2. What I was curious about is for us diesel owners what are people using. To avoid an opinon war, I figured the best way would be to just list what brand you use, not why. For diesels the 4 brands I seem to keep seeing are Mobil Delvac, Shell Rotella (I'm using this now), Chevron Deleo 400, and Castrol GTX.
Again, I don't want to start a flaming war. As long as people just list the brand and not opinon, there shouldn't be any arguments, I hope. If I remember correctly Scott Longston uses not Mobil Delvac, but Mobil 1. Of course he can correct me if I am wrong on this.

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1999 MB SL500 (110,000 mi)
2004 Volvo V70 2.5T (220,000 mi)
2014 Tesla Model S 85 (136,000 mi)
MBCA member