white smoke meens your burning oil black smoke meens its runing rich. your probably burning a litle bit of oil. in most cases whene you burn just a litle bit of ol you will never see the oil level go down unless you dont change the oil for 3 years. its not realy a big deal to burn a litle oil.
i thought blue smoke meant oil. it smells like gas to me but i could be wrong. it smells like the exhaust of a 60s muscle car my friends got.