Two-Stroke Mix Ratio Check
The inverse of the two-stroke mix tile: the gas:oil ratio you ACTUALLY made from the oil you poured, 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.
Formula and source
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.
Audience
This tile is built for trades and the adjacent professions in the Agriculture and Forestry group. The interactive calculator runs entirely in your browser. No account, no fee, no advertising, no tracking.
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Posture
Rough Logic answers the math question the working professional asks on the job. The site is a calm, fast, ad-free, account-free, ever-free reference. It does not interpret code. It does not replace the licensed professional. It does not store your inputs. The Authority Having Jurisdiction governs all installations and inspections.