But on average, with pretty much everything else, it works just fine.

I suppose its still possible to game with own label goods, from what I've observed it only seems to come up in a limited range of goods, sauces and suchlike.

I havent weighed a litre of oil, but a litre of water is a kg, so water based goods should be fairly comparable ml to g, that's the basis I work on anyway.

Yeah, you can easily multiply the number by 10, but it requires conscious attention.