I just filled up with 93 Octane at a Shell station. Cost me $48. Only got me 19mpg highway, maybe a little more since there was maybe a gallon or two left in the tank when I went back to the gas station. Got about 325 miles out of the trip before going back to the gas station.
Edit: I thought our gas tank was 17 gallons, I guess its 15. So if that's try, that's about 21mpg highway. Probably closer to 23 if I actually drove it until the gas ran out.
Edit 2: I have a 2003 5MT MSM IS300 with 175K Miles.
2001 GGP IS300 ❌SOLD
2003 BO 5MT IS300 ❌SOLD
2003 MSM 5MT IS300 ✔ CURRENT 🌞
2001 GGP IS300 ✔CURRENT ❄️