Originally Posted by ROLLGUY

Not wanting to start an "oil war", just want some opinion and/or experience on using 15-40 conventional oil in my M112 ('04 E320). From my research, the main reason for this oil NOT being used (or recommended) from the factory is the added ZDDP can kill catalytic converters (from burning oil). I don't think my M112 burns any oil. Also, thinner oils are used for higher fuel economy. However, I have heard of MANY people running this oil in EVERYTHING!! (old cars, new cars, equipment, gas diesel etc.). I would like to run 15-40 conventional oil in my M112, as I have access to a 55 gallon drum. I do run this oil in all my Diesels anyway, but would like to add my gasser to the mix, and don't want any engine failures because of my choice of oil. I like to go no more than 5,000 miles between changes (multiples of 5,000 is also easy to remember for this old brain of mine). So, what say you?????