my car is smoking when i cut it on. Now i was at PIP import shop and he told me that i was burning oil somewhere. im wondering my friends told me that i might be running lean, and that since i had a new built up motor with new pistions and rods and stuff that i should be like that for awhile. i just want to know how long should it last. the car smokes out the muffler only when i turn the car on, and has been doing this for about 200 miles and since wed.