2009 Yaris Sedan engine vibrates; is this normal?

[txprsn]

I just bought a 09 Yaris Sedan (Automatic) and have noticed the car has a slight vibration. I can feel it on the seat when I am driving. I would not classify this as a shake, more like a slight vibration. When I open the hood, I can see the engine and some ducts and hoses vibrating, but not shaking (perhaps if I post a video it could help describe it). I feel it when in idle and then not so much in the highway, perhaps bc of ambient noise/motion.

Is this normal...how loud and how much should a Yaris vibrate.

I noticed this a few days after I bought it and I want to say after I put gas from Quick Trip (87). I tried some Chevron with Techron today and noticed it still vivbrates.

Maybe I'm being paranoid and picky.

Never driven a Yaris (or toyota) so I dont know what to expect. I come from driving a '03 Passat.