Not running smoothly after oil change
 

I don't know if I'm imagining it but I can't help thinking that my '06 ES330 (52k mile) is not running as smoothly as before.

If I'm not imagining it, what might have gone wrong during the oil change?

the things i can think of would be
wrong oil weight used
too much oil
too little oil

other than those im not too sure :S

Check:
- oil level
- dip stick is all the way in
- oil cap is secured
- check for any loose/leaking vacuum line
- check if the air filter box is secured / sealed