Swamm|E

I understand what octane does for fuel, but I was wondering if there is any benefit of 100 Octane for 1.8T engines if they run stock? Does the car somehow figure out what octane fuel it's running and increase compression if higher octane fuel is present?

There is a Sunoco near my GF's apt that has 100 Octane fuel for $4.89/gallon...

CessnaDriver

You mentioned the word airport (or maybe apt = apartment?). Make sure they aren't selling 100LL (low lead).

Airplane engines use 100LL and that might be what they are selling.

BTW, I can get 100LL at our airport for $1.89 a gallon.

simonyun

i'm pretty sure he means apartment

Quattro527

...gas we use in our cars..

Swamm|E

Thanks for the warning, I wasn't going to bother wasting the $5/gallon unless there was some tangible benefit from it - so there was no chance of filling her up with LL fuel.

Also, the fuel is near the New England Speedway in Laconia, NH - it's labeled "100 octane race fuel". I suppose it was brought into town for the motorcycle races that went on during motorcycle week up here. I don't recall ever seeing it before.

CessnaDriver

Sorry, when I see APT, I think "airport" since I am a private pilot. : )

Hopefully someone will answer your question correctly then. I am curious too.

From what I understand, the ECM will advance your timing to take advantage of the octane and give you a little more HP, but I am not entirely sure.

ex-quattro PETE

so you're just wasting your money. Stick with 93.

the senator

APR Stage 1+ with the 100 Octane option will use that 100 octane the way it should be used.

Swamm|E

Thanks for the replies.

408_B6A4

100 octane is a waste of money if you are stock.