I have the same car and this one uses oil more than any car I've ever owned, even my '92 SSE with 175,000 miles.
Plugs look new and exhaust pipes show no unusual amounts of carbon but she uses about 1/2 quart of oil every 3,000 miles. On my last oil change I was shocked to be down 1/2 quart at 1,000 miles. I topped her off and she is holding steady after another 2,000 miles. Very weird. I use 10w-30, usually store brand. I'm not going to worry about it because I know these engines go on forever. Oh, I can rev the heck out of the engine and see not a twit of smoke. No leaks either.
Regarding the trans, I get a weird lurch just once in a while. It is usually when I'm not expecting it, like when I'm just starting to climb a steep slope and I give her a little gas and slam. Just for a milisecond. Then all is okay til the next time maybe 1 or 2 months later. Go figure.