Anybody with Acura Mdx 2014

Hey I’m curious should I use 91 octane gas for my model it’s 82,000 I previously bought it last month I bought it from buy here pay here used car lot … nobody told me I read the manual but I wanna keep this car forever till I get enlisted to the Air Force the problem is there really isn’t really no octane gas station in my area 😭😭😭 please don’t attack me I’m still new to the car industry 😎🫶🏾