How high octane can we run in the S without hurting anything?

 

The higher,the better.
you'll never find high enough octane,on the street,to hurt the engine.

 

dont fill your tank with jet fuel

 

Not quite true. The engine and ECU can only use so much "octane". Beyond that, it's simply useless and is of no benefit unless you re-tune and re-build the engine into something completely different. All you're doing is spending extra money for absolutely no benefit.

 

Jet fuel is basically kerosine. It is one of the crudest forms of fuel there is. Just as you would not put diesel into your car, you would not put jet fuel in there. Don't let the term "jet fuel" make you think its great. Modern day gasolines are highly refined petroleum products with lots of additives to support clean combustion.

 

So will 110 or 116 octane be aight?

 

It's your money.

 

An octane rating,of 93,is about as high as you can get,for street gasoline.
Sunoco,used to have a little higher octane,in their "Super"super.(around 104,if I remember).
and,it wont hurt anything.

 

Isn't 110 or 116 usually aviation fuel? If it is, it is generally heavily leaded which you don't want.

 

One time I read on the internet about the S not liking higher octanes.....

I decided to test this myself. I filled the S with 91 octane (which is now $3.50+ a gal, vote bush) and did some runs, logged everything. A few days later I filled up with a 96.2 octane blend and repeated the procedure. Conditions were very similar and believe it or not, there was LESS timing with the higher octane. Strange world.