i'm not losing any water as far as i can tell, very, very slight white-ish smoke or vapor. it can only be seen in bright sunlight. earlier today, i smelled teh exhaust just after startup, and i didn't notice any antifreeze smell from there. i notice it when i'm inside the car. so i guess the heater core is the next logical culprit.

recent cooling system work - new water pump, but the smell was around before then, too. the radiator and all the hoses i can see easily seem good.

the oil looks dirty, but not really milky.