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840 or 808

2334 Views 7 Replies 6 Participants Last post by  2048 Demon
Had my dealer install the crate PCM and high octane button. When I put 100 octane in or 93 octane in, it shows up in blue light that 840 high octane activated. Why would it show that with only 93 octane?
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I was going to say, these cars can't detect octane since it's a calculation, not a detectable characteristic.
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