ive got a 94 civic with a jdm gsr in it im running a p72 ecu, my question is when im letting it idle it white smokes real bad out of the exhaust and smells like oil but when i take off or rev it up it clears out, what is this, i replaced the o2 sensor could this be the problem. im not sure. please help!!!!!!!!!!

 

so no one can give me any ideas