I have a 2004 Focus 2.3 auto with 182145 miles At speeds of 35 -65 mph it blows heavy blue smoke from tail pipe, a loss for power, it lasts for 5- 15 seconds. It may only happen 1 time a day or 2 or 3 times a day. Once the oil gets 1 - 2 quarts low it doesn't do it . I removed valve cover to check oil return holes, clean ,nothing clogged up .Next removed intake manifold to get to PCV vale & chamber on block. Removed cover, nothing clogged .Hose is open & firm. replaced PCV valve with Autolite AP103. Still blows heavy smoke . Any suggestions on what to do neat ?