Fun science/work thing: janitor has cheap plastic measuring jug but needs to be fairly sure it's accurate enough (~10ml in 300) for a brake fluid change on a bit of lawnmower kit. It was pretty damn good, our +/- 0.3ml stuff left us arguing whether the meniscus should be at the top of the line (yes), or bang in the middle as it was. And we tested it with water, so your brake fluids may vary...
I like interdepartmental cooperation stuff, written in to my job description but doesn't happen enough.
@_thegeoff in general, why isn't it a better idea to weigh liquids? I would assume that their density is usually accurately known, and scales omit a few silly problems with graduations: nonlevel ground, gross mixups (e.g. of multiple graduations), and deformations of the container (dents or squeezing for metal, heat -related ones for plastic).
@robryk We chatted about that - density of liquids obviously varies, but some also vary volume more than others as temp changes (fill your car on cold days, it's sold by the litre!)
But if the recommendation is by volume (and almost certainly at sea level, 20C, which we're pretty close to, go with that. More just an exercise in curiosity for us, but yeah, if you're filling a large aircraft, or worse, a rocket with cryogenics, it all gets important!