Alright, so I got around to doing a compression test this afternoon and found that all cylinders are below spec for pressure. Spec is 120, mine ranged from 100 -115; majority hitting the 105-110 mark. With an engine that has close to 227k miles on it, I'm not real surprised that they aren't at that factory mark. Since I couldn't single out a cylinder, I'm pretty much still at square one. Next thing I plan on doing is changing oil and dropping the oil pan while I'm at it to see if there is anything there to see (just curious after reading Freds thread from a while back). I've been using Mobile 1 High Mileage synthetic 10W-30, but because it's not cheap and for now I have to keep adding oil on a regular basis; are there any recommendations for a cheaper oil?