The getty by me where i have been going for a long time has super at 92 octane. If I start using 93 all the time, will I notice a difference?

 

I doubt very much if you will notice any difference in performance. The recommendation for my 04 is 91 octane and without modifications that octane or anything higher should all perform the same. Depending on your specific engine, you may even find that 89 octane or lower will also perform adaquately. But I would definitely use 91 or higher if you are racing or consistently push the engine hard.

For much more information on octane number, check out all of my posts on this thread (Octane Number and What It Means) on this site.
http://forums.maxima.org/showthread....6&page=1&pp=30

 

You will see no benefit at all.

 

No difference, and you will save money......

 

Not really, the 93 at hess costs the same if not cheaper sometimes than the 92 at getty. Getty is just more convient.

 

Miniamal if any..

Check a few months back, they tested a 350z in SCC Magazine and gained ~5-8 whp cant remember but it in that range.