Chabad.org — English translation + Rashi
Torah Temimah points to Menachos 78a.
E-Daf.com — Menachos 78a
HebrewBooks / Shas PDF
English: Unleavened loaves mixed with oil and unleavened wafers smeared with oil — loaves are mixed and not wafers mixed; wafers are smeared and not loaves smeared.
Diyuk of belulot vs meshuchim — loaves receive oil by mixing; wafers receive oil by smearing.
Challos receive oil by mixing into the dough; rekikin receive oil by smearing after baking. The Torah’s distinct language for each form (“mixed with oil” for the loaves, “smeared with oil” for the wafers) teaches two different procedures for incorporating the oil into the oven-baked minchah.