RE: OS Vspec question.....here we go again
5 liters (just over one gallon) is way less lifespan than most report for a V-Spec, even the people who don't like them get more than that.
One of my V-Spec is at 5 gallons, 19 liters, and is still going strong. The rod is starting to move a tiny bit, but nothing like the pictures above. I will probably replace it at 6 gallons.