30. you refer to oils by their parent companies name. "I only use oils from SOPUS".
31. you know the meaning of acronyms such as SLOB and GC and that has now become the name you refer to them as.
32. you can't figure out why the guy at autozone doesn't know what GC is and you actually try to argue with him about what a 0w is.
33. your wife is afraid you are up at night looking at internet porn and doesn't believe you are really spending that much time researching oil.