Have been using 0W-40 Mobil1 in my '95 E320 since purchase last summer. No regrets or misgivings. Personally, I like to see the development of oil pressure immediately after start up;this is when lubrication is critical to the top end components in my opinion. Not wanting for this thread to spiral down into another infamous "oil thread", I will cease with further opinion.

Perhaps my oil choices are seen by many as gambles; time will tell. I have been using 5W-40 DELVAC1 in my 1982 300D Turbo for over 40,000 of its 152,000 miles and it still runs satisfactorily using ~1 quart during my 5,000 mile changes. Have only changed the oil (0W-40 Mobil1) in my '95 E320 twice in the last 10,000 miles and its consumption is negligible during the 5,000 mile intervals.

Another suggestion would be to call Mobil's 1-800 662-4525 and ask them questions/express concerns. The list of automobile manufacturers endorsing the use of Mobil 1 synthetic oil in their product offerings might be another source of opinion. On these shores, open the hood of any recent year Corvette, V-8 Mustang, Viper and you will see the Mobil 1 applique in a conspicuous place. Besides other German marques (BMW & Porsche), I recently attended a car show south of Houston and noticed a $317K 2005 Maybach 57 had the Mobil 1 decal on the sheet metal above the radiator indicating this is the preferred oil for this engine. Works for me ...

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'82 300D Turbo 204K
'10 Toyota Prius 85K
'13 AMG C63 (P30) 23K
'14 Audi Q5 TDI 46K
'16 RAM 2500 CTD 12K

'10 VW Jetta TDI 65K (traded)
'12 Nissan Leaf 34K (returned end of lease)
'15 Audi A6 TDI 25K (traded)
'95 E320 166K (traded)
'93 300D 2.5 Turbo 168K (sold)