Hypothetical question on strato saws

[RTK]

The fresh air that is purging the combustion chamber has little to no oil in it and must go round the piston to their respective ports. That can't help lubrication on the top end.

 

[timistall]

bar oil?

So, if the 261 runs 15 min. longer than the 260 will we run out of bar oil per tank of gas?