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Old 06-18-2008, 12:06 AM   #5 (permalink)
Tango Charlie
Deadly Efficient
 
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Join Date: Jun 2008
Location: Northern Indiana
Posts: 976

Olivia - '03 Vibe base
90 day: 38.88 mpg (US)
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Quote:
Originally Posted by MetroMPG View Post
It won't matter in your car. Money out the tailpipe.
Yeah, shoulda specified I wasn't inquiring in regards to my '88 Accord. That'd be the proverbial golden ring in the swine snout. Thanks for the link, MetroMPG. Good info.
My OP was triggered by a discussion I had with a coworker regarding FE/octane/knock sensors. Theoretically premium should improve FE as the ECM advances the timing. I just wondered what the ecomodding community experiences in the real world...
Learned something new today; Some (most?many?) ECM's will advance the timing several times until knock is experienced, thereby determining what octane is in the tank, and adjust its spark table accordingly.
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