yes, i took off my pcv and used that line. as soon as you remove the pcv valve from the line the engine will run rough and almost stall. the line has alot of vacuum which i poured a half the can into it. i reved my engine while doing this so it wouldn't stall. by the time i had half a can in it it started to smoke. hooked the pcv system back up. let it sit with the engine off for like 10-20mins. i put the other half in the gas tank ( have about a half tank a gas at least) turn the engine over, the engine doesn't want to idle so give it some rpm's. i held it at 3,000 for pretty much the whole time and let go down to 2,000 than up to 5,000. mine smoked out the parking lot. the more smoke the more it's working. it lasted about 15mins. after the smoke dies down to where it's really not that bad if u goose it take it out on the road and drive it like u stole it. get on it for like 15-20 and that's it. from what i've been told u should do a oil change after using it. hoped i helped ya.