I gave this a go yesterday as my hair & scalp gets so dry this time of year due to weather & hormones. I liked the results but I may try it with jojoba oil next time as it took three shampoos to get the olive oil out. Anyway, hair is silky & feels healthy again:

to 1/4 cup of organic virgin olive oil -OR- sweet almond oil -OR- jojoba oil
add:
10 drops of lavender EO -OR- rosemary EO -OR- basic EO (essentail oil)

Massage well into damp (not wet) hair. For longer hair, you may need to add more oil. Cover with shower cap or plastic bag, then wrap head in a hot, wet towel. Keep on for 30min., rinse with shampoo twice (or in my case, 3 times). The results are worth it, though.

Cheap & easy alternative to the hot oil treatments you find at the pharmacy!