OK- I am going to work this morning and while at the traffic light I hear my engine knocking-sounded likt the rods. I pull over and there is no oil in the block! I check the oil Friday nite and it was at the 3/4 full point of the dip stick. Saturday I hooked a long piece of vac line to the front of the plenum to clean some stuff out of the engine using seafoam. It smoked like **** but the car ran good after this was done, not sure if it helped or not. Right now I am thinking "rebuild"-how much (on average) should I expect to pay for rebuild. I am in Winston Salem NC. This car is starting to bug the heck out of me.