Two-Stroke Mix Ratio Check
The gas:oil ratio you ACTUALLY made from the oil you poured.
Example
You enter
- Fuel amount 1
- Fuel unit gallon
- Oil added (fl oz for gallons, mL for liters) 2.56
- Target ratio (X in X:1) 50
You get
- Achieved ratio 50:1
- Dose 2.56
Details, formula, and sources
ratio = fuel volume / oil volume, flagged against a target. 2.56 oz in a gallon is 50:1; 3.2 oz is 40:1 (richer). A LEAN mix (higher X:1, too little oil) starves the bearings and risks seizure - the dangerous error; a RICH mix (lower X:1) smokes and fouls but protects the engine. First-principles volume arithmetic; the equipment manual's ratio governs.
ratio = fuel volume / oil volume (same units; 1 US gallon = 128 fl oz); oz per gallon = 128 / ratio; verdict vs the target ratio.
Two-stroke fuel/oil mix ratio check by volume, the inverse of the mix tile; first-principles volume arithmetic, public domain. The oil grade and ratio are set by the equipment manufacturer.
Pure arithmetic, public; modern air-cooled two-strokes are commonly 50:1 with a JASO/ISO oil, but the equipment manual governs.
Estimate. AHJ and licensed professional govern.
Field names used by the API: fuel_amount, fuel_unit, oil_amount, target_ratio, ratio, oz_per_gallon
- Ratio by volume achieved ratio = fuel volume / oil volume, gas:oil by volumeequipment manufacturer specification
- Lean vs rich a higher X:1 (lean) is the dangerous under-oiled error; a lower X:1 (rich) smokes but protectssmall-engine practice