According to their policy, the O/U does not certify dairy breads. Recently, many breads manufactured by Bimbo Bakeries USA, including some Arnold brand breads were reformulated and now contain dairy. As a result, breads that were previously certified by the O/U no longer carry the O/U symbol. Consumers should be careful to look for the O/U symbol to ascertain that a particular product is Kosher.
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.