Blueberry seed oil (INCI: Vaccinium corymbosum (blueberry) seed oil) contains some interesting compounds and fatty acids! It has 1% to 5% palmitic acid (C16:0) and 1% to 3% stearic acid (C18:0), around 12% to 22% oleic acid (C18:1), 43% to 53% linoleic acid (C18:2), and 29% to 32% linolenic acid (C18:3). It has a shelf life of 6 months to a year - I wasn't able to confirm this, but it seems more likely with all that oleic, linoleic, and linolenic acids that it will be more like 6 months.
Blueberry oil contains quite a lot of phytosterols - 580 mg per 100 grams or 5800 ppm - which behave as anti-inflammatories, help our skin repair after damage, reduce trans epidermal water loss, and offer moisturizing. This is a ton of phytosterols, and is amongst the highest of the oils. (Higher than soybean oil, which is considered to have a lot of them, but not as high as sesame oil, which is really high.) It also contains about 110 ppm tocopherols, which isn't very high. The anti-oxidizing power of this oil comes from the polyphenolic compounds like anthocyanins. And check out the squalene in this oil! With 1781 ppm, it's got quite a lot, which might help chapped and cracked skin, prevent UV damage to skin, and offer cell regenerating properties.
How does it feel and appear? I thought it felt like a very light oil going on - I'd compare it to being slightly heavier than fractionated coconut oil or more on par with our esters - but it was a little draggy on my skin. I expected it to feel like the other light oils, so it'd go on quite smoothly, but I found it seemed to sink in really quickly but was a little harder to apply. Weird. An hour later, it feels like the oil has been absorbed quite well with no greasy after feel. There is no odour, unfortunately.
I'd consider blueberry seed oil an exotic oil due to its price, which varies from supplier to supplier quite a bit. Formulator Sample Shop carries it for $9.00 for 2 ounces. Lotioncrafter has it for $5.95 per ounce. From Nature with Love carries it for $16.25 for 1/2 ounce.
Summary of blueberry seed oil:
INCI: Vaccinium corymbosum (blueberry) seed oil
Suggested usage rate: 1% to 10%
Shelf life: 6 months, possibly up to a year
Tocopherols: 110 ppm
Phytosterols: 5800 ppm
Squalene: 1781 ppm
References for the fruit oil series:
Table 4.1, this textbook
Value-adding factors in cold pressed edible seed oils and flours
Journal of Food Lipids. Mar2009, Vol. 16 Issue 1, p33-49. 17p. 4 Charts.
Food Chemistry. Aug2011, Vol. 127 Issue 4, p1848-1855. 8p.
As a note, I was given this blueberry seed oil to play with by the Formulator Sample Shop. They gave me the oils for free and I have been playing with them in the workshop. I am not paid for my opinion and they were advised that I would be sharing my opinion, good or bad, on my blog. I also received a small sample of it from Suds & Scents.