Oil consumption / OBD :(
Hey guys, im new here and im having some problems with my 94 325ia. my car have 102kmiles (not sure if its the real thing) im from brazil wich is a hot weather and i use a 15-45w semi synthetic. WIch runs fine for like 2+ months and after that i check the dipstick its at/under the minimum mark. i have often a wierd smell in the cockpit (im not sure its burned oil smell). and i do have some dripped oil on my garage floor. Not sure if it is enough for the low oil problem. I've bought some valve seals (wich has never been replaced). And im concerned if its really burning oil from the combustion chamber. I've checked te OBd diag mode, it just keep showing me: "1221 , 1221 , 1221, 1221......" wich i think its wierd cause, i read it was supose to show some other error codes or "1000". and i bought the o2 sensor (1221 error). And now im concerned if its time to rebuild or try pistons rings. Any advice or help? cause rebuild a 6l bmw engine here, its REALLY expensive.