why do a bunch of gas stations have 88 octane cheaper than 87? (lemm.ee)

submitted 2 weeks ago by [email protected] to c/[email protected]

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I figured it was a marketing gimmick to get you to buy 88 and then they would finally raise the price, but it's been years. are they adding extra ethanol or something?

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[-] [email protected] 3 points 1 week ago

If anything, it would make sense to have gasoline with ethanol content in summer because ethanol is more knock-restistant, which you are more prone to if tempereatures are warmer.

[-] [email protected] 1 points 1 week ago

Ethanol usage in the summer creates smog and other pollution which is why it's normally only for winter usage. Except this year, they allowed it to be used longer in an attempt to give Biden a boost in the polls

[-] [email protected] 2 points 1 week ago

I googled a bit and the web said that ethanol does indeed burn cleaner which makes sense since there should be less contaminants and more oxygen is available. Ethanol also absorbs more heat then vapourized so there should be less heat in the combustion chamber resulting in less NOx emmissions. Do you have any sources for your claims? I would like to read about it because clearly i don‘t know everything about burning ethanol.

[-] [email protected] 3 points 1 week ago

“Adding ethanol to gasoline is known to increase smog pollution in hot weather, but research has shown little difference between E15 and the more-widely available E10 blends.”

https://www.reuters.com/business/energy/us-epa-allows-temporary-expansion-higher-ethanol-gasoline-blend-this-summer-2024-04-19/

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this post was submitted on 01 Jul 2024

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