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Elantra N Octane learning

626 Views 6 Replies 4 Participants Last post by  Midenginedriver
I wonder if the 1.6t cars from Hyundai and Kia do this as well but just not as a published thing like they do in the Elantra N owners manual. The pictures below are from the Elantra N owners manual.
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The first time I pumped 93 Octane into my tank I noticed the MPG numbers in the dash made a big change after driving my FGT for a couple of minutes. I assumed this was because the ECU determined the octane change.
Don't know if the ECU does this, like the Elantra N, but I got a kick out of the MPG changes.
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