Hey Ms Jennifer
I also pretreat with olive oil (to allow the hair to retain some of its moisture following a wash). I spritz the hair with warm water then apply warm oil all over, cover with a plastic cap, then sit under a warm hooded dryer for 5 min. Then I let the oil stay on another 10 or so min. If time permits, I leave the oil in for hours!
Yes, I add olive oil to my conditioner also, mainly to combat the drying effects of the mineral oil, which is also in my conditioner (Motions Moisture Plus). To be honest, I've never measured the amount of olive oil I've used. I have a 5 oz applicator bottle filled with olive oil. I warm it then apply some of it to my hair (from roots to ends, but esp the ends) prior to adding the conditioner. Then I sit under a hooded dryer on warm from 15-30 min. HTH
God Bless,
Peachtree