Don't get wrong, I have heard nothing but great things about their fuel additives. Even if I had heard of their oil additives, it still doesn't mean the car companies want them used. Who knows, maybe McGeorge is using some low grade motor oil and have to add this oil additive. Of course charging th customer for it.

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1999 MB SL500 (110,000 mi)
2004 Volvo V70 2.5T (220,000 mi)
2014 Tesla Model S 85 (136,000 mi)
MBCA member