Thanks.

For what it's worth, my E300D has been loving Mobil 1 5W40 TDT for almost twenty thousand miles. I put Pennzoil's High Mileage dino in for the first post-purchase oil change, and didn't notice any leaks when I switched to synthetic.

__________________
RIP:
2011 E350 BlueTEC, Schwartz 81k (totaled by uninsured drunk driver)
1964 Unimog 404.1 (wrongfully towed by the city)
1994 E320, Brilliantsilber 208k (transmission shuffled off after sudden catastrophic fluid loss)
1982 300D, Silberblau under a blue repaint 256k (sold for parts)
1995 E320 Polarweiss, 131k (sold for parts)
1995 E300D Polarweiss, 287k (totaled by drunk driver)