I have a friend (I know it's hard to believe) who has used the product in his E320 for the entire 250,000 miles at a ratio of one quart at each change interval.

That information aside: Mystery oil is widely used to lubricate air tools; has been for as long as I've been alive, and it's what I run through my tools. My $0.02

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1992 500SEL 25K
1995 E320 40K
1995 SL600 120K
2002 JX8 Sport 43K
2005 Volvo S40 95K
2006 Isuzu NPR 304K (Frankencamper)
2007 Crown Victoria 150K
2014 Smart Electric 20K