I use 87 and get 22 mpg.

 

Ditto on the 87 - but I usually average around 19.......

 

i split the diff and run 89...

been gettin g18 in mixed driving..

 

I haven't seen 93 anywhere in SoCal. However, when I was in New Jersey I did see Sunoco gas stations with 93 octane..

Anyhow, I've got 8000 miles on the 8 and have been getting ~275 miles per ~13.5g fill for the past ~10 fillups (~2 months). I cycle through 87, 89, and 91 on every trip to the gas station.

 

I've actually seen more topics about it not mattering what grade you use.

 

Some stations in Santa Monica offer 93. I live near San Marino and off huntington I've seen some stations offer 93, but you'd be insane to get 93 in Cali, it'll cost like 2.70 a gallon.

 

nahh... remember John I have to commute so I am doing more constant freeway action plus I try not to shift a lot in heavy traffic. thus slower speeds not as much fun but when i can I push her hard. then I get a beautiful 14-15 mpg!

 

I have only used 91 and I won't put 87 in it
bottom line

 

And the only difference you notice is your wallet is lighter.

 

^^
you might be right
but better safe than SORRY

 

That lighter wallet is weight reduction for the quarter mile

 

Ping Ping ping ever rotery i have owned including my 8 must have hige octane fule to keep from pinging.. dont cheep out just by the good stuf and save you engin.. must peeps cant even tell when there car is pinging.... But like i Said i have gotten my 8 to ping when i could not buy anything except 87 ...

buy the good stuff.. 91 is ok btw.

 

i'm in dallas and all they have is 93 for premium gas...