I have been using 91 octane in my N/A PT for about a year and a half now. I notice a difference... every so slight difference, but it's there. The engine seems to like it better, and from what I've heard and read, the higher octane creates more heat, and requires less fuel, and is better all around for the engine. I figure a couple bucks extra every couple weeks is worth it if it gives me maybe another horsepower and ft/lb, and if it will help keep the engine running longer.
__________________
|