Do you know your hair properties? That is very important in saving you a lot of time with trying different things.

I suspect either you have grapeseed oil that is not pure grapeseed or you simply have a rancid bottle.

Grapeseed oil has protein in it, juanab, that's possibly why it didn't work well for you.
remember, with all advice or suggestions for your hair, YMMV!!
My hair:
2b wavy, medium texture, low porosity, med-high density. Protein finicky.
My routine:
Cleansing: DCNP, every 4-5 days (occasionally use CJ cleansers).
RO: CJSC, occasionally use JCDC
Gel: KCCC, CJCIAB for 2nd day hair (sometimes third)

Heat is my friend: warm water rinses, steam caps, and diffuse dry. I love CLU cloths and my Denman.