The right percentage of essential oil is extremely important when mixing into a cream/lotion or carrier oil.
i.e.100ml of base or body cream will require no more than 12% of essential oil;so up to a combination of no more than 12 drops and also no more than 3 different pure essential oils to be used.
I would recommend that you decanter a small batch of cream and mix freshly each time you're going to apply it to your skin;then you would only need a couple of drops of pure essential oil on each full body application.It's great to be able to mix your own bespoke products but do be careful as these substances are powerful natural substances and can still cause irritation and allergies with some sensitive skins!
P.S. Never mix with a mineral oil/baby oil as these are synthetically produced and are not absorbed into the skin.
It is also essential to check if the cream contains essential oils as well.
If you do create your own skin care blend then keep it in the fridge in an air tight container and its' therapeutic properties will be prolonged for 3 months:)