A 1970's uk bike mag put a two stoke middlewight on the dyno and tested oil mix ratios and power. increasing the jet sizes with the more oil rich ratios so as not to run weak.
and surprisingly they found the bike produced the most power at 20-1
the opposite of what they had first thought.
ever since then instead of trying to use as little oil as possible - like most two stroke owners I assume
I try to use 30-1 or even 25-1.