i was thinking the same thing.. but i guess it burns oil? i had to add a qt 2 weeks ago.
2008 335xi e92- JB4 G5- BMS DCI- VRSF DP- Aero lip- Ram Air- Morr VS8.2- BOV
Current 2007 335i e90 - Sold
2003 E46 M3 Vert. Taig on Black 6spd- Sold
2002 Taig / Red / / / M3 - SOLD
2006 330i e90 - sold