FTD -
the cloud of smoke is a non-issue, even after a couple of hours. because the motor is 'flat', it is possible for it to turn off in a position where oil can enter the cumbustion chamber.
as for the ticking, this is not uncommon under certain conditions. if you drive at a constant 3k - 4k RPMs for a few minutes, it should go away. if it doesn't, it's possible you have a sticky lifter. this can be cured with certain oil additives.
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