Well I'm getting tired of putting in 3qts of mobile-1 sythetic every 1000 miles into by b16. Could it be getting sucked through the pcv system? my compression is good, 230psi on all 4, new valve seals 5k mi ago with a head gasket,JE pistons and rings have 25k mi on them and no leaks.. If I run it hard and then sit at a light i smell oil burning, so i'm thinking that when the pcv gets vacuum it's sucking oil from the breather. Also if I coast down my mountain in gear 3-5k rpm without giving it gas, then get on it at the bottom it smokes like a bitch.. could this just be a shitty side affect of having cast pistons? It's run great for 25k mi with this problem the whole time, it just bugs me since syn oil is $23 for 5 qts and i just burn it up.. any thoughts are appreciated.