I just filled up my gas tank for the first time and see that it called for 91 octane. I stopped at a Shell gas station and they had V-power which is 93 octane. I assume the more expensive gas cant hurt, but is 91 octane the preferred gas? Will the car run better on 93? I plan on sticking to a certain octane level from here on out, whether it be 91 or 93.
I appreciate any advice.