1 gallon 25:1 for Shindaiwa two cycle water pump, 4 gallons 80:1 for 20 h.p. Yamaha outboard (supposed to be 100:1 but I like it a bit richer), 1 gallon 32:1 for Jonsereds chainsaws, Echo trimmers, Shred 'n Vac and small Echo chainsaw (supposed to be 25:1 for big saws and 50:1 for trimmers etc...