There have been no reports of cancer being linked to essential oil usage — yet. (usingeossafely.com)
Without external evidence, high oil usage can be from worn piston rings allowing oil to be sucked into the cylinders and burned. (mechanics.stackexchange.com)
For example, our company collects data about cooking oil usage to drive our dynamic distribution of oil, as we deliver cooking oil only when our customers need it. (fb101.com)