^Because we have a V-4, right?

I use BP 93 /w Invigorate.

 

93 in the Ralliart and Endeavor

 

Use what the manual states. If it says 91+ use 91+. If it says 87, use 87. Putting 93 in a car that requires 87 is a waste.

 

Premium only!!! Top tier gas only!!! (shell, texaco, 76, chevron)

 

If the manual says 91, and you're completely stock, you shouldn't get any knock with 91 octane. That being the case, a higher octane is useless. However, if you're tuned, a higher octane can obviously resist knock better thus allowing a more aggressive tune or a larger safety margin in the event that the tune is a bit too aggressive for 91.

 

i go BP 93 all the way

 

+1 shell V power

 

THIS.

And gas is gas. Top tier or not. They are refined at the same plants. I noticed zero differences (logged too). As long as the station doesn't blend its 93, its good. (Some are bastards, and will top off the 93 tanks with 87...)