20w-50,
Even though the car performed admirably for 15 years I made the mistake
of using 20-50 in my wife's 85 Grand Am...The car was used on short
trips and 95% in town non-freeway driving. There was a sludge build up
in it and I should have used a lighterwt oil. Her Honda asked for 5-20
and gets it. For the last few years our nitro motor used Torco 70 heated
to 160 before starting, never had a bearing problem.
After break-in my gas motors always ran Mobil 1...Tried it once in the
80's and gain 2 mph at El Mirage setting a record so I kept with it.
Will do it again when I start running my stuff in 05 or 06.
I believe heating oil is am important part of preping an engine. One of
the earlier statements about filer bypassing should part of all our
thinking. J.D.
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