Re: 100:1 Mix
i don't think it really matters. maybe the packages are like ketchup packs, where it's hard to get all of it out, so Opti 2 gives you extra. maybe their packet filling machine needs to be upgraded. maybe the guy who wrote the copy for the packs sucks at math.
i use the 10oz. bottle, with 10oz. increments, and i pour it by eye anyway, not to mention my 2 gallon gas tank holds 2.3 gallons, so for all i know i could be running 92.666:1