Doc...Here in our small town we have 91 at a mom and pop c-store. It cost not much more than 87 swill so I put that into our lowly v-6 Challenger. I also use it in my 3010 Deere,our lawn tractor,and lawn mower. Quit being a cheap azz...If you can afford a Scat Pack you can afford the good gas. Take good care of your car...