When you do a search on Enarco sales, you get a bunch of White Rose items also. Looks like Enarco was the oil side, and White Rose was the gasoline.
From the "enarco.com" website:
"The National Refining Company used many trademarks throughout its 68 years of operation, but the one most familiar is the EN-AR-CO and White Rose trademarks. EN-AR-CO was used for the grease and oil products and White Rose was used for gasoline. EN-AR-CO was the trademark used by the company starting in the early 1900's. The White Rose trademark has changed over the years and so has the EN-AR-CO trademark. One of the earliest company logos was of a squared-off eagle; then came the styled eagle, and then the familiar Boy and Slate. I have included copies of the original trademarks. To see more trademarks click here."click here for link to Enarco