I have an 05 wrx, I bought it about 3 and a half months ago. It has been losing coolant slowly since I bought it, probably between half a gallon and a gallon in the last 3 months/7000 miles. Its not leaking outside the motor anywhere, and up until this point I haven't seen any in the oil. I changed my oil over the weekend and the old oil looked fine, it was black and thick considering how cold it was. After I added the new oil I let the motor idle for a few minutes and checked it again and noticed some white globs on the dipstick that looks to me like when I've seen antifreeze mixed in on other cars in the past. The thing is my oil level has never risen, it stays right at the full mark or drops just slightly between changes. I would think that if all that coolant was getting in the oil that the oil level would rise. The antifreeze looks very clean and green. I did a compression check the other day, and every cylinder averaged 120 psi. I did a coolant system pressure check today and the pressure drops somewhat slowly. I tried it again with the engine running just to see and it drops a little quicker. I am paranoid that I have a head gasket leak, I can't afford to have them replaced, I am pretty much broke and I don't know if I want to tackle it myself. Does anyone have any ideas? I've heard of some sort of dye you can put in the coolant, would I be able to see this in the oil if it made its way in there?