Jojoba, Simmondsia Chinensis
Technically it is not really an oil but a wax ester with a composition that makes it very similar to skin sebum thus allowing it to penetrate deep into the skin and minimising the chance of bad reactions as well as making it strongly resistant to oxidation (i.e. giving it a long shelf-life).
Jojoba oil has anti-bacterial, anti-inflammatory and anti-oxidant properties, helps control sebum production and can be used, among others, as a long-acting moisturizer, make-up remover, hair conditioner or carrier oil.