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?
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.
Knock resistance is related to octane and not ethanol content directly I thought
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
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.
There’s a difference between summer and winter fuel for gasoline engines in some areas. It’s usually to do with smog restrictions.
The same octane can be reached with different blends of hydrocarbons. So instead of just ‘pure’ gasoline to hit a desired octane, refineries can mix together higher and lower octane fuels to reach the same overall octane rating. This increases the amount of refinery products that can be used to blend gasoline, so it can be made more cheaply. The trade off is that it’s less pure, and most importantly for this comment - that some components of of these cheaper blends may evaporate more readily, leading to smog.
In summer, when it’s warmer, some areas mandate gasoline must meet certain standards for evaporation. In winter, those standards are decreased, because it’s cooler.
Ethanol has a relatively low evaporation point. I don’t know the specifics of the commenter’s location, but I could see ‘summer gas’ having no ethanol to meet these standards.
More info: The Vapor Rub: Summer versus Winter Gasoline Explained — Car and Driver
that’s wild. is this relatively new? I used to live in the Great White North and I’ve only been down in Florida for 10 years
I am not sure but I suppose it’s the opposite of what we have here commonly called winter fuel, which I think has some additives to help engines run better in low temperature conditions.
Are you thinking of diesel? Winter diesel has additives to stop it thickening in the cold weather
