I read my owners manual and Toyota recommends 87 octane or higher unleaded gasoline. The Lexus version of our motor requires 91 octane fuel. My truck seems to run better on 93 than it does on 87. With 87 Octane I can hear it momentarily ping on hard acceleration and my gas mileage goes down slightly.
Anyway I usually put 22 gallons of fuel into my tank. Regular costs $1.47 and the 93 octane costs $1.59 here in Massachusetts. The difference in price when filling my tank with 87 Vs 93 octane gas is $2.64. I can't believe people make a big deal over such a little difference in price when they drive a 20-30 thousand dollar vehicle. Don’t forget you get a few more miles out of the higher octane gas because the computer isn’t retarding the timing to reduce the pre-ignition or detonation, which reduces fuel economy.