Growth booster - castor oil

Just got some castor oil for hair treatment. But since I'll be running out of shea nut oil soon, I'll have to use this for my warm-down massage & down-jelq after my routine.

But since I wipe off most of the oil before I apply my Ace wrap after each session, I don't know how much it will aid in my gains

thought about trying this but as i do a lot of manual stretches is it gonna make it too slippery

I would say Castor oil has a lot of drag. Vaseline (long time since I've used it, but I do remember!) is more slick and slippery than castor oil. Just keep an eye on, it can be detoxifying and cause purging, from what I gathered quickly. You could dilute it to a drop of Argan oil for example. I might try 50/50 Argan and Castor oil. Argan is slippery, but the castor oil should add some resistance and drag.
Once again, trial and error will show what's the best deal.