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If you have "white" exhaust with little to no smell that is steam.
So a blown head gasket or coolant getting into the cylinders.
If you have "blueish white" exhaust that is excess oil getting into the cylinders.
From what you describe I think it is probably an AOS issue.
And that the smoke was most likely "blueish white"
You could pull a spark plug or two and look at them.
If the smoke is caused by oil the plugs will be blackish or oil fouled.
If the smoke was caused by coolant the plugs will be very clean almost unused looking.
You could buy a coolant system testing kit and pressure test the coolant system.
Testing the coolant system would either eliminate the coolant system as part of the smoking issue.
Or confirm it as part of the issue.
Harbour freight has them for around $90.00
But looking at a few of the spark plugs should tell you if the smoke was caused by oil or coolant.
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