I have been here since 2009, I can honestly say I've not heard of someone dealing with this before. But oil fouled plugs are sure a sign of bad rings or valve guides.
It would seem that a compression test will tell you if the rings are bad, if they aren't, then it would likely be a valve guide (which would be less work and cheaper).


I must ask, was this a dealer purchase or private sale? If any our our members sold a car in that condition, I'd be surprised altho we did have a guy sell his car with serious issues, one time, a few years ago. I knew the guy was a creep and after that, we all knew it. Anyway, if it was a dealer sale, I think there are consumer protection laws you can fall back on. Very sorry this has happened.