My car is smoking on acceleration and when its under load. I did a compression test and that came out good. I don't know if its using any oil because it has an oil leak. I don't think its running rich cause I don't have any cel's even though I think my gas mileage sucks. I did a leak down test and that came out alright, but for some reason, cylinder one is affecting cylinder three. I think it might be my head gasket because I'm loosing antifreeze and there is no external leaks.