Mobil 1 5W-40 ESP-M Quart 6-pack $29.97 after rebate from Amazon.com

[SSSSE YA]

Pretty good price for the recommended oil for our 6.3 engines.

http://www.amazon.com/gp/product/B009IE2N4A?tag=5336118859-20
http://www.amazon.com/gp/product/B009IE2N4A/ref=oh_details_o00_s00_i00?ie=UTF8&psc=1?tag=citofgamonlco-20&tag=5336118859-20

[viperCFP]

I'm not sure if MB ever changed it's mind again, but at one point, they took back the ESP-M oil for their gasoline engines due to the ethanol in our gasoline:

As a reminder, to maintain the integrity of the Diesel Particulate Filter (DPF), specification 229.51 oil must be used for Diesel engines. Mercedes-Benz recommends Mobil 1 ESP Formula 5W40 for MY2007 and newer Mercedes-Benz Diesels.

"MB sheet 229.51 approved oils; low ash long life - Mercedes pioneered this new spec for passenger cars with diesel engines with EURO 4 or Bluetec exhaust particle filters and longer service life than the 229.31 oils. The spec was introduced in 2005. Change intervals increased to 20,000 kilometers. Based on ACEA A3 B4 and C3"

As a precautionary measure and in an effort to better protect Mercedes-Benz engines from the potential long term effects of the increased use of ethanol. DCAG has decided to differentiate the engine oils that are used for Gasoline and Diesel engines.

As such, Mercedes-Benz 229.5 0W40 engine oil must be used for all gasoline engines including AMG. Mercedes-Benz recommends the use of Mobil 1 0W40 for all gasoline engines including AMG, with the exception of the SLR. 0W40 engine oil is more effective in resisting the possible corrosive effects of acidic moisture that can be caused by the increased use of ethanol. The SLR requires specification 229.3, Mobil 1 5W50 oil. To maintain the integrity of the Diesel Particulate Filter (DPF), specification 229.51 must be used for Diesel engines.

With that said, Amazon has the 0w-40, which I've seen widely recommended for Vipers, and what I have in the '96 GTS.  Thanks for the link, 12 quarts are on their way via free shipping to my house  <1

http://www.amazon.com/Mobil-96989-0W-40-Synthetic-Motor/dp/B000SKV4U2

Pretty good price for the recommended oil for our 6.3 engines.

http://www.amazon.com/gp/product/B009IE2N4A?tag=5336118859-20
http://www.amazon.com/gp/product/B009IE2N4A/ref=oh_details_o00_s00_i00?ie=UTF8&psc=1?tag=citofgamonlco-20&tag=5336118859-20