The O/U certifies Kroger Ranch Flavored Tuna as an O/UD (dairy) product. This product contains dairy ingredients. Some labels bear a plain O/U symbol, without the “D” (dairy) designation.
From The KIB: Pesach News – Avocado Oil and Spray
All Pure Virgin Avocado Oil & Spray (without additives), are fine for use on Pesach without a special Pesach designation on the label.