I've never heard/seen of 20W-60 for aircraft engines (I'm a pilot and
aircraft part-owner). 100W, which is equivalent to SAE 50W, is common,
however (it's like syrup at ambient temperatures). 20W-60 is/was available
from Penrite (for autos).
I would NOT put aircraft engine oil in a car ... they have a much different
additive package--particularly for scavenging lead--that probably wouldn't
be suitable. On average, it's quite a bit more expensive as well.
As an aside, Mobil 1, the first fully synthetic aircraft engine oil, was pulled
from the market a couple years ago. The claim was it wouldn't scavenge lead
properly, resulting in gummed-up rings (particularly on some large-displacement
Continental engines). Semi-syn is popular now, though.
bs
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Bob Spidell San Jose, CA bspidell@comcast.net
'67 Austin-Healey 3000 '56 Austin-Healey 100M
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> It is my understanding that 20-60 oil was originally recommended for
> both engine and trans. I am using castrol 20-50 but I believe 20-60 is
> available for aircraft engines.
> Kurt L.
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