It just better be a flat graph is all.....

90 octane is premium in Alaska, and it sucks as well. I had it tuned for 89 because that is the closest thing to our crappy gas the tuner could find in Dallas. The newer GM ECM's have two different timing curves. When the knock sensors detect detonation, the curve defaults to the less aggressive timing curve. The EMC will not reset to the more aggressive timing curve unless the fuel tank is topped off. It's just better to tune the things for the gas available and turn off the dual curve toggle. I use EFI Live and usually tune my own vehicles, but didn't want to mess with this one because I'd never be able to load it up in third or fourth gear like the tuner can with a chassis dyno.

90 is "premium"??? what's the regular octane rating up there?

3

87 is regular, 89 is mid grade.

It's a joke. An oil producing state with refineries all over the place, the highest fuel prices in the US and we have crap gas.

In CA, it's 87, 89, 91.

Ont's is 87, 89, 91, 94.

Typically in GA, SC, NC, VA in my travels I have seen 87, 89, and 93 at most pumps. Occasionally the top octane is 92 instead of 93.

Interestingly, the price difference between 87 and 89 is usually the same as that between 89 and 93, making 89 seem like the biggest rip-off.

Absolutely gorgeous car, though I feel bad for you trying to keep black in detail shape. Swirl marks show up so easy.
Never been there, but I imagine Alaska has some great driving loads. Have fun!

Very nice Michael! I think you need to bring it on down to Cali. and we can do some fun runs.