I purchased Hi-Yield grass killer to put a damper on the bermuda grass
starting up in my fescue lawn. The application instructions says to
use 1 oz of the grass killer with 1 oz of oil concentrate. It doesn't
specify what the oil concentrate is. I suspect the oil is for making
sure the grass killer attaches to the grass leaves; sort a like using
dish soap within liquid weed sprays. Anyway, what to use for
oil concentrate? Mineral oil, motor oil (grin), vegetable oil, or
what?

Appreciate your insight,

Thunder