[Wisco_xi]

so i was racing a buddy and the day after i noticed that i had smoke coming from my exhaust more the driver side then the passenger. so after doing extensive research on what it could be. i believe its my turbos. today i went to a buddies house that has a lift. i disconnected my down pipes from the rest of my exhaust. at first glance the front turbo was caked up and dirty on the inside. the rear turbo was alot cleaner. i started the car up and reved it up. after letting of the gas from a 5000k rev, smoke only came out the front turbo but only when letting of the gas. the other turbo did not. but what i did notice on the rear turbo is there was oil on the outside and dripping a little of the return oil line. then im driving home and give it some gas and it started to kind of misfire. i pulled over and at idle i was smoking alot and when ever i reved my engine it would stutter at first and be fine up to 5k. at idle it had a nasty rumble sound. i turned of my jb4 and the car and restarted it. ran fine but still has smoke blowing out the exhaust. please help could it be anything other then the turbos? why is there only oil on the turbo not smoking from exhaust?