Aux tank in 190 is behind the AFT tank, and the AFT tank already burns before the FWD tank.
In a 190 there is no need to use manual burn* because it already burns in this order: AUX, AFT, FWD.
*The only time I do this is when I have a DT, I'll sometimes burn some/all of the AUX so that if/when I drop the DT early I can dogfight better, then I switch back to auto burn and drain the DT as normal.