There is a wide variety of cooking oils from plant sources such as olive oil, palm oil, soybean oil, canola oil (rapeseed oil), corn oil, peanut oil and other vegetable oils, as well as animal-based oils like butter and lard.
We called a couple of the brake fluid companies and the answer was two to five years is a safe number for an unopened container. Wilwoodâs tech line claims that if the container is sealed, they feel it has an unlimited shelf life, but I would consider five years to be the limit.
When I checked the brake fluid, which looked great the time before, it was murky. I know that's not good, and I'm afraid the the combination of murky fluid and a random, unrepeating brake failure are signs that something in the system is failing. I'm moving about 180 miles away within the next few weeks, so I would like to get this addressed before I make the trek.