|Although many of today's two cycle engines use oil injection to automatically mix oil and gasoline, many due to size, weight, cost, or other considerations use premixed gas. For an excellent smoke free, odor free injector oil, consider Amsoil's HP injector oil, or for engines with exhaust power valves such as power sports applications, try Amsoil's Interceptor synthetic two cycle oil, or Dominator two cycle racing oil.|
The formula for mixing two cycle oil properly is actually quite simple. Think of all units as ounces. If your two cycle engine manufacturer recommends a 50:1 ratio like many outboard motors, it means 50 parts gasoline to 1 part oil. Newer engines might call for 100:1 ratios. This means 100 parts gasoline to 1 part oil. A weed eater or chainsaw might call for a 16:1 mixture, or a 25:1 mix.
Let's solve the formula . One gallon of gasoline equals 128 ounces. A pint of two cycle oil is 16 ounces. Suppose you have a six gallon fuel tank.
Six gallons gasoline x 128 ounces/gallon=768 ounces.
Divide by 50 for a 50:1 mixture ratio.
768/50=15.36 ounces oil (approx. 1 pint)
Divide 768 by 100 for a 100:1 oil mixture.
768/100=7.68 ounces oil (approx. 1/2 pint)
So for six gallons of gasoline at a mixture rate of 50 to 1 or 50:1, use 15.36 ounces of two cycle oil. This is only slightly less than one pint. For twelve gallons of gasoline at 50:1 ratio, use one quart or a little less than 32 ounces. Likewise a six gallon gas tank mixed at a 100 to 1 mix ration would use 1/2 the oil, or 1/2 pint. Obviously the less oil used, the less pollution your engine will cause. The slight difference between the calculated mixture, and the amount in the containers is insignificant.
See the table below for the amounts of oil and gas for popular two stroke mixtures.
Although this is simple for people who are always using the same two cycle premix ratio in the same engine, it can be difficult for landscapers or others who use several two stroke power tools in a days work, and don't want to mix several tanks of premix gasoline.
Fortunately with the advent of synthetic two cycle oils, there is an easier way. Amsoil manufactures what is called a one mix, or multi mix oil. Saber professional 100:1 premix oil can protect all your two cycle engines. No matter what the manufacturer recommendation for your premix, you can use saber professional premix oil at the 100: 1 ratio. This includes all chainsaws, weed eaters, lawn mowers, blowers, edgers, scooters, or any other 2 stroke engines.
Amsoil also manufactures a special 100:1 premix oil for outboard motors. Whether the manufacturer recommends 50:1, or 100:1 ratios, this one premix oil will protect.
Both these oils are smokeless and exceed all manufacturer specifications. For ease of use, all saber professional premix two cycle oils are offered in one ounce pillow packs, one pint bottles, and one quart bottles.
Learn more about two cycle engine needs .
|Two cycle premix ratio chart (NON multimix)|
|Ratio||Gasoline||Two cycle oil|
|16:1||one gallon||1/2 pint|
|16:1||six gallons||3 pints or 1.5 quarts|
|24:1||one gallon||5.5 ounces|
|24:1||six gallons||one quart|
|50:1||six gallons||one pint|
|50:1||twenty five gallons||two quarts|
|50:1||fifty gallons||one gallon|
|100:1||six gallons||1/2 pint|
|100:1||twenty five gallons||one quart|
|100:1||fifty gallons||1/2 gallon|