Hey guys need some help, my car throws bluish smoke from exhaust, which led me believe it was oil, but it doesnt seem to be burning oil, ive driven the car for about 2k miles and doesnt need any oil at all. It only does it when im at a stop takin off, i dont know if i should be concerned or not. Just fyi, i have no cats on car at the moment, they were clogged up so took them off to be able to drive the car, it did smoke even when it had them on, anyways hope someone can tell me its nothing serious, thanx