Methylated Crop Oil seen on the label as methylated seed oil.
Any of many crop oils used as a spreader. More common spreader/stickers also "spread" the material out by lowering surface tension like soap. But most also contain "sticking agents" that prevents the herbicide from washing off with rain or irrigation. Drive75 can set up a pre-emergent barrier if it get's washed off the foliage after treatment. That barrier can last for 3 or 4 weeks. If the residual stays on the foliage because of a sticker, then the barrier doesn't form as well.
We don't sell MCO's (agriculture suppliers have it though). Yet I've gotten not a single complaint about Drive's performance. Most of my customers are using a standard non-ionic surfactant or spreader/sticker without incident.