A woman gave me 3-12 oz. bottles of Motorvator Dot 3 Brake Fluid in unopened plastic cans today. It says made for Kmart on the bottle. She has no idea how long it has been in her shed. One of the bottles is kind of squeezed in, but the other 2 look normal. Is there a shelf life on unopened plastic cans? Would you guys use this brand or should I just dump it in the recycle can?