I have them too on my chest / bicep tie in areas near my armpits. I have actually found emu oil works quite well. Of course you can never 100% get rid of them, unless you resort to surgery, but I have found the by applying emu oil everyday does actually fade them quite a bit. I have been doing this for the past 6 months.
The reason being, emu oil actually penetrates into the third transdermal layer of the skin (qute deep) which is where the tears in the skin actually are.
Give it a go, but don't purchase the cheap emu oil you can buy for a few dollars, buy the triple filtered emu oil made in australia which is the more pure quality and extracted from emu birds that are fed a natural diet, and not pumped full of antiobiotics or hormones. You can buy this for around $15-$20 which should last you a few months at least.