32:1 Gas Oil Mix Calculator

A 32:1 gas-oil mix means 32 parts of gasoline to 1 part of 2-stroke oil. For example, 1 US gallon of gas requires exactly 4 fluid ounces of oil, or 1 liter of gas needs 31.25 milliliters of oil. This provides more lubrication than 40:1 or 50:1 ratios.

Use 32:1 for classic 2-stroke engines from the 1980s-1990s, high-RPM equipment, or when specifically required by your owner's manual. This ratio is ideal for older engines that need extra lubrication but less oil than 25:1. Modern engines typically require 40:1 or 50:1 with synthetic oils.

For 5 liters of gasoline at a 32:1 ratio, you need 156.25 milliliters (mL) of 2-stroke oil.

For 1 US gallon of gasoline at a 32:1 ratio, you need exactly 4 fluid ounces (fl oz) of 2-stroke oil. This makes 32:1 one of the easiest ratios to remember and measure.

32:1 provided a balance between adequate lubrication and reduced smoke compared to 25:1. Classic engines from the 1980s-1990s used improved metallurgy that allowed slightly leaner ratios than vintage 1970s equipment, but still needed more oil than modern engines with synthetic lubricants.

32:1 has more oil (4 oz per gallon) than 40:1 (3.2 oz per gallon) or 50:1 (2.6 oz per gallon). More oil means better lubrication but also more smoke and carbon buildup. 32:1 is for classic engines, while 40:1 and 50:1 are for modern engines with synthetic oils.

No, do not use 32:1 in modern engines designed for 50:1. The excess oil will cause excessive smoke, carbon deposits on pistons and spark plugs, reduced performance, and potential fouling. Always follow your manufacturer's recommended ratio.

Use high-quality 2-stroke oil rated for your engine type (air-cooled or water-cooled). While classic engines were designed for mineral oil, modern synthetic or semi-synthetic 2-stroke oils provide better protection and cleaner combustion. Check your owner's manual for specific oil recommendations.

Yes, 32:1 produces noticeably more smoke than 50:1 because it contains about 56% more oil. While less smoky than 25:1, it still produces more exhaust smoke and carbon deposits than leaner ratios. This is normal for the ratio but may be excessive in modern engines.

Premixed 32:1 fuel should be used within 30 days for best results. Use fresh gasoline and add a fuel stabilizer if you need to store it for 60-90 days. Always shake the container before use to ensure the oil and gas remain properly mixed. Store in a cool, dry place away from direct sunlight.