That would be interesting. However I'm sure the results should be similar, with negligible differences between their data as those analysis are based on standardized chemical tests. I just stick to Amsoil with whatever I have to do or need, that they offer.

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1999 Mercedes-Benz S600, 103K miles - garage queen
1988 Mercedes-Benz 560SEL, 89K miles - daily driver
2007 Hyundai Sonata Limited, 31K - daily driver