I am burning about 1 qt of oil every 500 miles. I just completed a compression test and the engine had good numbers across all cylinders ( 175 psi ). The plugs are oil soaked when I pull them. This, in addition to, feedback here on the forum leads me to believe my valve stem seals are worn-out. The odometer reads 205,800 miles, and I have no signs of leaks in my garage. My question for you folks is : Have any of you changed out your valve stem seals without pulling the head off the block?