This was inspired by the other thread about brake discs, brake fluid life, brake pads, etc.
I have an opened bottle of dot 5.1 which I used when I did my clutch. I now want to change a rear caliper, and I'll probably try and bleed new fluid through to all 4 calipers.
Does an opened bottle have a shelf life similar to fluid in the car, i.e. 2 years?
Or less? Or more?