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GEN 2 (2017-2020) Ford F-150 Raptor Forums
Ford F-150 Raptor General Discussions [GEN 2]
Gas Octane Question
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<blockquote data-quote="EricM" data-source="post: 1376493" data-attributes="member: 20286"><p>I've had 12 month old 93 octane run through a high boost engine and there was no knock whatsoever. According to your math it should have been down to 81 octane at that point. Do you mean one "point" or 0.1 per month maybe? I don't disagree with you overall, over time you do lose the lightest parts of the fuel which tend to be the ones with the best anti-knock properties. With the sealed up fuel systems these days, it's not actually lost, but it all ends up in the charcoal canister and not in the actual fuel being dumped into the engine at high rates under WOT.</p></blockquote><p></p>
[QUOTE="EricM, post: 1376493, member: 20286"] I've had 12 month old 93 octane run through a high boost engine and there was no knock whatsoever. According to your math it should have been down to 81 octane at that point. Do you mean one "point" or 0.1 per month maybe? I don't disagree with you overall, over time you do lose the lightest parts of the fuel which tend to be the ones with the best anti-knock properties. With the sealed up fuel systems these days, it's not actually lost, but it all ends up in the charcoal canister and not in the actual fuel being dumped into the engine at high rates under WOT. [/QUOTE]
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GEN 2 (2017-2020) Ford F-150 Raptor Forums
Ford F-150 Raptor General Discussions [GEN 2]
Gas Octane Question
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