100 to 1 Fuel Mix Calculator

100 to 1 Fuel Mix Calculator

US Gallons Liters

To get a 100:1 ratio, you need:

function calculateMix() { var fuelAmount = document.getElementById("fuelAmount").value; var unitType = document.getElementById("unitType").value; var resultDiv = document.getElementById("fuelResult"); var oilOutput = document.getElementById("oilOutput"); var conversionDetail = document.getElementById("conversionDetail"); if (fuelAmount <= 0 || isNaN(fuelAmount)) { alert("Please enter a valid fuel amount."); return; } var oilNeeded; var displayUnit; var detailText; if (unitType === "gallons") { // 100:1 means 1 part oil for 100 parts gas. // 1 Gallon = 128 Fluid Ounces. // (fuelAmount * 128) / 100 oilNeeded = (fuelAmount * 128) / 100; displayUnit = " Fluid Ounces (fl oz)"; detailText = "Based on " + fuelAmount + " US Gallons of gasoline."; } else { // 100:1 means 1 part oil for 100 parts gas. // 1 Liter = 1000 Milliliters. // (fuelAmount * 1000) / 100 = fuelAmount * 10 oilNeeded = fuelAmount * 10; displayUnit = " Milliliters (ml)"; detailText = "Based on " + fuelAmount + " Liters of gasoline."; } oilOutput.innerHTML = oilNeeded.toFixed(2) + displayUnit; conversionDetail.innerHTML = detailText; resultDiv.style.display = "block"; }

Understanding the 100:1 Two-Stroke Fuel Mixture

A 100:1 fuel mixture is a specific ratio used primarily in high-performance or modern lean-running 2-stroke engines. This ratio signifies that for every 100 parts of gasoline, you must add 1 part of two-cycle engine oil. Getting this ratio right is critical for the longevity of your engine; too little oil causes friction and overheating, while too much oil can lead to spark plug fouling and heavy carbon deposits.

How to Calculate 100:1 Mix

The math for a 100:1 ratio is straightforward but varies depending on whether you use the Metric or Imperial system:

• Metric System: Since 1 liter equals 1,000 milliliters, you simply divide 1,000 by 100. This equals 10ml of oil per liter of gas.
• US Customary System: One US gallon contains 128 fluid ounces. Dividing 128 by 100 results in 1.28 fluid ounces of oil per gallon of gas.

Mixing Table for 100:1 Ratio

Gasoline Amount	Oil Required
1 Gallon	1.28 fl oz
5 Gallons	6.4 fl oz
1 Liter	10 ml
5 Liters	50 ml

Important Safety Tips

When mixing fuel for your equipment (such as outboard motors or specialized chainsaws), always follow these best practices:

1. Use Fresh Fuel: Gasoline degrades over time. Use fuel that is less than 30 days old for the best performance.
2. Mix in a Separate Container: Never mix oil and gas directly inside the engine's fuel tank. Use a certified fuel canister to ensure a thorough mix.
3. Shake Well: Always shake the container vigorously before refueling your equipment to ensure the oil hasn't settled at the bottom.
4. Check the Manual: While some modern oils claim they can be mixed at 100:1 for any engine, always prioritize the manufacturer's recommendation found in your owner's manual.