Originally Posted by PikkaGTR

are you tuned for it? on a stock car it wont really make a big difference and would be like literally burning money Just because the higher Octane is less likely to knock does not mean the ECU will automatically run higher boost/ more aggressive AFR, as it wont know what fuel is in the car, it will only go to what it normally needs to run, sees no knock and assumes the fuel grade is adequate for the factory parameters and call it a day.

Originally Posted by Snoopy408

There are a number of 76 stations that carry 100.
For example the 76 at the botton of hwy9/big basin.

Originally Posted by mooshoo

Im not tuned for higher octane but i mix it with 91 for track days simply for the added safety margin

Originally Posted by Funks

Same here, canyon driving this weekend and purchase about 4 gallons of 100 octane then fill it it up fully with 91..

You basically get 93.5 octane - better knock resistance just as an added safety margin on a 91 octane tune.

Originally Posted by El Wray

There's another at Almaden Expwy & Foxworthy.

Originally Posted by PANGES

South San Francisco, there's a place called Gotelli's Speed Shop that sells race gas by 5 gallon canisters. I use to buy my C16 there.

Originally Posted by JelloChex

I stopped off at the 76 Station in Stockton (Vanco Truck & Auto Plaza - 1033 West Charter Way, Stockton, CA) and found out that they sell 100 octane at the pump. It was $8.69/gallon this past weekend.

Originally Posted by Heedz

I also found that the shell at kettle man in Lodi has it too!

Originally Posted by a10495

should just optimize for some e85! burns like 105, at a fraction of the cost!

Originally Posted by 1WRXNFX

This is good to know, i have fam who live in lodi off the 99 so if i drive the GC I can fuel up before heading home and not have to swap maps back to 91. But it takes twice as much, and if your lead footed and like to drive your car hard you'll be filling up twice if not 3 times as often.