I have just over 500 miles on a freshly rebuilt TR-3 engine that was
modified for increased performance by Uncle Jack Drews with ported and
polished
head, 2.2 liter cylinder liners, hotter cam, and header. I want to change
oil but I'm not sure what to use at this point.
I will eventually probably go with a full synthetic like Mobil 1, but I
suppose at this point I may still need to be "wearing in" the cylinder
liners, etc. Would a 20W50 racing oil be a good choice or just a regular 20W40?
At what point can I assume the engine is fully "broken in" and switch to
synthetics, or should I avoid them and just use a good racing oil?
Thanks!
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