I think occasional oil smoke from the current PUs on start up is of less concern to the engineers than the fans. Could be several reasons, cylinder to piston clearance being one. Not sure about the ‘overfilling’ suggestion though. If it doesn’t happen during the race, then I can’t see that it would suggest a ‘down on power’ PU.
Certainly from what I’ve read tyre management was the issue later in the race, but maybe LH was just driving better at the beginning.....
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