My understanding is that GM has two tables in the ECM. If pinging is detected the low octane table is used and timing is retarded and the mixture is richened. If no pinging is detected the high octane table is used by the ECM.
Hi all,
This is my first post. I am the proud new owner of a 2021 Equinox LT. I have all the bells and goodies. I love the panoramic sunroof and all the safety stuff. I have the HID headlights with intellibeam and love this combo. I am routinely getting +30 mpg. I changed the oil at 1900...
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