Ok... so, it seems as though I have a nasty compression leak, and a bit of a knocking in cylinder #2, coming from the intake valve(well, one of them at least). And, I believe i'm going to have to be looking at a new head gasket soon enough. I also believe this may be what is giving me fairly poor mileage. for my 94 EGT 1.8L, about how much would I be looking at spending for a new head gasket through say, a Mazda dealer??? I could just get my uncle's shop to install it, or if nothing else just take it over to my buddy's house and have his dad help me (he worked with the 1.8L's when they started using them, plus he's got more tools than the Snap-On dealer.) But, just a rough estimate as to what this may cost me????