i will probably run my tank down to the reserve tank and possible out of fuel alltogether. then i will just bleed the system free of air and be ready to roll.

it will probably mix fine even if you have 1/2 a tank or so, but in the long run you could see some seperation. and even with 30% 70% mixture, you have way less WVO to have glycerin seperate. so as long as you watch your fuel filters, you should be fine.

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