With today's economy not at its best...
A quick search on the net. This may start answering your question.
CA allows 91 oct. to be called premium. Only 91 oct at best is piped to CA.
The attached link says some 76 locations carry 100 octane - may want to check that out (probably $$).
CARB may have answers. It is likely a reformulated gasoline issue . . .
Yes, what is wrong with Houston??
The Best of Mercedes & AMG

GasTips.com - Current Gas Prices in YVR
Aren't E55 supposed to get better than 91? When I lived in Europe Octane went up to 98 as I remember. Does 91 (assuming you get real 91 - there is some fudging on that) not trigger knock control and reduce power some?
$4.49 - 91
Chevron - Huntington Beach








