Am I miss-understanding something, I thought the 14.7:1 Stoich ratio (really closer to 12:1 under load for N/A Engines and 11.0:1 for well tuned FI Engines) mea

Am I miss-understanding something, I thought the 14.7:1 Stoich ratio (really closer to 12:1 under load for N/A Engines and 11.0:1 for well tuned FI Engines) meant for every 14.7 Grams of Oxygen, it requires (Molar weight of Air) / ((Molar Weight of Gasoline) * 14.7) . Granted it's been a while since I've taken Chem, but that was the impression I was under.