I have grass that grows like vines it continues to migrate into my garden. I think it is called burmada grass. The stuff is a nightmare to kill. Cut it off and the pieces grow. Till it and it helps it grow faster.
I cook 4 slices of bacon for breakfast every morning after a month I have 1 pint of cooking oil I don't need. I spray the oil on the grass and it kills it dead.
Online says oil kills grass by sufficating it. The grass can not breath so it dies.
I assume any oil will work.