I missed most of this thread, so maybe this info has already been posted to
the list.
In July '96, Consumer Reports magazine did a test on 20 motor oils
including 2 synthetics: Mobil 1 and Performax. Their conclusions were
that "...no brand - not even the expensive synthetics - to be meaningfully
better...". Their lab tests did show the "...synthetics flow exceptionally
easily at low temperatures..." and "...also had the highest viscosity under
high-temperature, high-stress conditions, when a thick oil protects the
engine. Thus, these oils may be a good choice for hard driving in extreme
temperatures."
Rod. '70 TR6 CC55899L
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