Work great for precise mixing and reusable.
I use these to measure 2 cycle oil for small 8 ounce batches that I make when doing yard work. I have both 50:1 and 40:1 trimmers.<br /><br />I did the math and found 4.81 milliliters gets me the 50:1 mix with 8 ounces of gas, and 5.91 milliliters gets 40:1 with 8 ounces of gas. Allows very precise and clean mixing. I use an empty Seafoam can or similar as the screw cap seals well and to avoid having lots of unused 2 cycle mix sitting around going stale. I use a measuring cup with funnel to get 8 ounces of gas spot on from my gallon container.<br /><br />50:1 requires 2.6 ounces of 2 cycle oil per 1 gallon of gas. 8 ounces is 1/16 of a gallon. Divide 2.6 by 16 to get 0.1625 ounces of 2 cycle oil. Convert ounces to milliliters and you get 4.81.<br /><br />I used the same formula for 40:1, substitute 3.2 ounces, divide by 16, get 0.2 ounces, convert to milliliters and get 5.91. Ratios stay the same and my trimmers are happy.
Rating: 5 stars