Finish on side on fretboard?

I'm going to be using tru-oil on my next couple of builds.
Should I be bringing the tru-oil up the side of the fretboard, stopping at the top, or should the sides of the fretboard get the same finish as the top of the fretboard?

I'm sure there are exceptions to everything but generally the sides of the fret board should get the same finish treatment as the rest of the neck.

I tested this for my past few builds with tru-oil. It is better to finish the sides of the fretboard as well, like what Chuck said.
If not, after you remove the masking tape, you will get a line there and it is very uncomfortable....

I am just now in the process of building my first uke but I have constructed and finished about 20 guitar necks (maple and rosewood FB's) and I always bring the neck finish (nitro) up the sides of the fret board. I have not used tru-oil but several builders I am in contact with use it exclusively with fantastic results.
It is definitely a personal preference, I like the way it feels.

That's what I wanted to know. Thanks guys.