Well not today but last night I swapped in some new Bosch spark plugs and red cap coil packs from ECS Tuning. I got the extra long socket with magnet for the plugs which made getting 'em in and out real easy. My 2011 has 56k miles and a quick spin afterwards sure seemed like it runs a lot better. $148 plus expedited shipping for the parts.
And a few weeks ago I put in a new PCV valve. You can see that by how clean that is compared to the rest of the engine. That sure made a difference in a couple ways. The car seems quieter now under the hood instead of the knocking, wheezing, and hissing from before. The PCV valve was $199 at the dealer. Took less than 30 minutes to install myself.