May have too agree about coolant. Check and remove oil cap to see if oil has been contaminated. Oil will turned milky brown if so.
Also tech may use a bore scope or remove intake to see condition of valves (see any reddish material is on valves). This may indicate the extent of problem and you may have head gasket problem.
Name: Blanca | 07 E92 | AW-Blk | ZSP | Alcon BBK | M3 Bits | VM RR Links | Koni | UUC Sways | V5 | Dinan CAI | ETS IC | Fge DV | ER CP | Cyba | Raden. Exh | Mod Step | Trunk Drawer | Perf LED Wheel | Illum Dr Sills | IS Shifter | Parrot | Philps D1S | 6000k fog | MTECH RR | CSL Trunk | Aero | Roof Spoiler | PSS on BBS RS-GT 19s