oil finish?

so i just built my first guitar and i've read about oil finishes but i can't find a how to online so what type of oil do i need to use? do i need grain filler/ sanding sealer? and how do i apply it?

Instructions here: http://www.lmii.com/carttwo/TruOil.htm

Yup, Tru-Oil.

Thanks my guitar is made of teak will the oil finish be usable?

Yup, Tru-Oil.

YUP

Does Tru-Oil darken the wood a little? I have decided to leave my new build raw but oil it lightly to seal it. The poplar has oxidized to a look I really like, but I'm going to need to sand it a bit at the next string change to smooth it up a bit. I'd like to regain the oxidized look and allow the wood to continue oxidizing to turn into whatever color it ultimately gets to. I'm not after a "protective" finish, just one that will keep it from drying out too much. Here's the thread showing the guitar as it is now.

http://www.tdpri.com/forum/other-guitars-other-instruments/345171-new-build-just-few-steps-go.html

Can I use teak oil instead of tru oil?

Yes you can or Tongue Oil

tru oil will darken it only a tad if you do a few light coats.

Hmm, maybe Valvoline...