Well, I'm no expert at all, I just noticed that with the
synth (even with the blend) the oil starts darkening much
later (sometimes it's still honey colored after 2k miles)
and judged by my high-precision finger feeling and eyeballing
it still has the same viscosity at 5k miles as it was at the
beginning.
Also part of the truth that I do very little stop'n'go traffic
and short drives and frequently make long (several hundred miles) trips.
Tiv
