The 16:1 ratio is a very oil-rich mix used by vintage 2-stroke engines during break-in periods or in classic motorcycles and snowmobiles. Mix 8 fl oz per gallon.
Quick Reference
Gallons
Liters
Fuel (Gallons)
Oil (fl oz)
1 gallon
8 fl oz
2 gallons
16 fl oz
2.5 gallons
20 fl oz
3 gallons
24 fl oz
5 gallons
40 fl oz
10 gallons
80 fl oz
Also see
50:1
40:1
32:1
25:1
24:1
20:1
100:1
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Facts About 16:1
⛽
PER GALLON
8 fl oz
🧪
PER LITER
62.5 mL
📐
OIL PERCENTAGE
5.9%
Equipment Rated for 16:1
This equipment uses a 16:1 mix ratio. Always check your owner's manual to confirm.
Vintage Puch
Classic Vespa
Tomos
Sachs
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⚠️
Ethanol Hazard
Use E0 when available, or E10 if your manual allows it. Higher-ethanol blends absorb water faster, age poorly, and can damage small-engine fuel systems.
Ready to Mix?
Use the calculator to get exact fuel and oil amounts.