Ok, ok, I'll change my damn oil. Lousy high-maintenance Benzes.
That Blackstone test looks kind of cool, has anyone ever sent a sample from a 1986-1992 300E to them?
I might do it just for kicks if the numbers could be meaningfully compared to someone else's.
I see from their web site they give you a "universal" average of their testing for your car make/model, but I don't know what they consider a "model".