Soslychic, I've done the stimulating oil thing so infrequently, but I do want to share what I do, just in case you're as averse to applying oils or anything to your scalp as I am.
In the past, I have made an overnight
preshampoo stimulating treatment using jojoba oil or avocado oil with a few drops of either peppermint EO (stimulant) or rosemary EO (another stimulant) and applied it to my scalp. I then slept in a plastic cap allowing my head to enjoy wonderful tingles through the night. In the morning, I shampooed away the oils and did my final rinse with ACV so I could make sure my scalp was squeaky clean. This way I got the stimulation without having to leave the oils in my scalp after the shampoo.
Another thing you could try -- and I say this from my experience with UBH conditioner -- is perhaps add a few drops of the stimulating EOs to your conditioner. Cathy Howse's conditioner has peppermint in it, and so it gives those tingles during deep conditioning, which is probably why I don't do the pre-shampoo treatments as often since I don't miss them tingles.
St Ives Intensive Moisture Treatment doesn't seem to do much for my hair -- although I haven't used it long enough to give an accurate review -- but it does give your scalp the tingles too, due to the rosemary and mint in it. I have only recently started using it and I only apply it to my scalp. BTW, you use it after your shampoo.
And now my FAVORITE tingles inducer: Aubrey Organics Rosemary and Sage Hair and Scalp Rinse. You use this after your shampoo and before your conditioner. Not only does it remove shampoo residue and prepare your hair for conditioner, but for the few minutes you have it on your scalp before rinsing it off to apply conditioner, you get this OUT OF THIS WORLD feeling. My final rinse is always an ACV one, but I'll tell you, even though my scalp always feels clean after ACV, it feels so much more alive if I use this AO rinse between my shampoo and conditioner. The AO Rinse is for normal to oily scalp... so can you say
SQUEAKY CLEAN STIMULATION GALORE?
[I wish they made a bigger bottle!]
OK...nuff raving f'now.