@Ragman,
Thank you, she bows.
I dunno, as I've both a poor sense of smell and shampooed out the olive oil after treating the hair with it.
To all, on thus getting oily dirty hair afterwards, no, it's still an every five days or so thing for me to wash it, however I wash it. That transition happened years ago, as I figured out washing my hair every day was an exercise in dry scalp making - plus I remembered my far ago childhood, when baths weren't that frequent and neither was hair washing.