Having problem with a proper oil to gas mixing ratio? Seachoice Oil to Gas Mixing Measuring Bottle allows the addition of the exact amount of oil required for a 2-cycle (2-stroke) engine. Oil level marks are in litre and gallon. Determines ratios for 100:1, 50:1, 24:1 and 10:1 mixes. This wide mouth, 946 mL size bottle can prevent fouled plugs or seized engines that can result from improper oil mixing.