I have a 1999 Ranger 4L V6, about 20k miles ago I had a cracked head, had both heads replaced, they were remanufactured heads. Right after that my truck started using oil, about 2 quarts between 3000 mile changes. It never used oil before, so I assume it has something to do with the rebuilt heads. I have tried high milage oils, oil additives, like no smoke, they help some. I went to 20/50 oil and that seems to help also, there is no noticible smoke. I read somewhere that using oil for diesel engines will slow down oil consumption, would it be ok to use it in my gas engine? The truck has 101,000 on it now. Would it hurt anything?