Hi all, new to the BITOG forums as a member, and I need some help on something. I drive a 2008 Hyundai Accent GS with close to 65,000 miles, and I've had an oil consumption problem for some time now (neglect by my father to change the oil at regular intervals sludged up the internals). Whenever I'd drive a long distance or just drive a lot during the day, the car would smoke on startup for 10-15 seconds and then it'd be fine until I drove it the same way again. I did a lot of research trying to figure out what it was, and determined it was bad valve stem seals and guides. About 2,200mi ago, my Hyundai dealer did a rebuild under warranty (shouldn't have with all the sludge, but I used to work there, so the Service Manager let the warranty kick in for me). The head was sent out for cleaning, new valve guides, and new stem seals, and the block was pulled to be cleaned and have new piston rings and a gasket rebuild kit installed. The rebuild seemed to work for two days before it started smoking really bad again, just as bad as before. It still smokes like the guides/stem seals are shot. I'm ~500 miles into a new 1500-mile oil consumption test at the dealer to get it put in for warranty service again (even though I wish they'd just accept that the rebuild didn't do the trick for some reason and the car needs to be fixed now). I'm wondering if the rebuild was even enough. Either the head work was botched and the new seals were damaged during the install, or there's something else at play here. What say you guys? Do I need another rebuild done right, or am I potentially looking at needing a new engine?