probabnly a stupid question but does 1ml of winny oil base, weigh the same as 1 ml water, what im getting at is on my last 10 ml vial i only got 8 mls, out of it, and before purchasing my next couple of vials i was thinking of injecting 10ml water or canola oil into my empty vial, and weigh them up with digital gram scales, make sure im gettin what im paying for, ??