Octane selector / switch?

[jalucerol]

Hi.
Is there an octane selector or switch? in my old Chevrolet Corsa there was an switch called "A/B switch", it was a way to telling to ECM wich RON were you using, A for 90 RON gasoline and B for 95 RON gasoline.
I'm wondering if there is something like that in my Aveo LT 1.6 and where it is located...

[sapozhnik]

Switch RON-95 (Aveo 1.6, 16v, ECU MR-140)
But this is Ukrainian forum (russian language)
http://aveo.com.ua/smf/index.php/top...html#msg336718

Google-translate:

ECU MR 140. Chips in a regular posting there. But you can do. Remove ground terminals accumulator. Disconnect connector "K" on the computer. Remove the cover from the connector. Seek out the disconnector contact so that went into the shoe. We put in the slot number 5 and collect it back. Wire with the new terminals connected to the body. I myself made such an operation. Result consumption fell approx. 1-1.5L. (While not exactly understand the data from the CD). At idle is more stable operation of the engine without the chips were walking speed 680 - 790 rpm. Now 685-710 rpm. Looked at the scheme lachika this ECU there contact K5 tightly wound on the body, as we have in the air.