Show Notes
With gas topping $4 a gallon this week amid the war with Iran, the EPA announced a plan to lower prices and stretch America's fuel supply by cutting more of it with ethanol. Will it work? Probably not. And as Joel, Kyle, and Andrew explain, it could actually ruin your car's engine.
Ethanol is an alcohol made from corn, and it's commonly added to gasoline as an oxygenator that helps it burn more cleanly and raises the octane rating. We used to use lead, but... that didn't work out. But there are downsides: it's less energy dense than uncut gasoline, so the more ethanol you add, the less efficient your car's engine runs. It's also a solvent, so it will eat away at rubber seals, hoses, and plastics in engines not designed for it. And it degrades quicker in higher temperatures, creating more smog during the summer.
Normally, a gallon of gas is about 10% ethanol, 90% gasoline by liquid volume. E15 gas, which is 15% ethanol, is sold in a number of states during the cooler months as "88 octane", and it's a bit cheaper—because you're literally buying less gas and more ethanol per gallon. Oil companies are typically banned from selling it from June to September because of the smog issue, but the EPA is now waiving the rule to encourage refineries to make more E15.
But if your car was made before 2001, even that 5% bump in ethanol content can really screw up your engine. E15 gas will also damage smaller two-stroke engines in motorcycles, lawn mowers, and boats. And even if you have a newer car, there's still a risk that comes with opting for cheaper 88 octane—especially if your car requires premium fuel.
Stories mentioned in today's episode:
The Feds Plan To Start Diluting Gasoline This May: Explained
Learn more about your ad choices. Visit megaphone.fm/adchoices
More from The Drivecast
General Motors just laid out its future and it's wrapped around bets on AI, new EV battery chemistry, new EVs, and autonomous vehicles. But the automaker's in the midst of launching new clean-sheet V8s, what gives?
Arguably the Corvette is General Motors' most iconic and important vehicle even if it's not a sales leader. As the possible finale of the C8 Corvette lineup arrives in the form of the Grand Sport a new leader is taking over the team and all of GM Performance. It's a critical moment, and Tony Roma has big shoes to fill.
Cars are more complicated, connected, and software driven than ever. The tuning industry is growing, but awash in shady characters promising big power gains if you yank out your car's brain and send it to them to modify. AutoTuner aims to show you can run a legitimate business in this space, but this is at odds with what automakers want.
America's EV charging situation is a mess. So much so that eight automakers banded together to create a joint venture, dubbed Ionna, and try to fix the situation. It's an unprecedented move on multiple levels that shows the gravity of the situation, how seriously automakers take the future of electric vehicles, and an entirely new business venture that diversifies these companies beyond just building and selling vehicles: now they are selling the fuel too.
A new law in California relaxing emissions tests for classic cars is being hailed as a “landmark” victory for the car community and common sense. But it’s not what it seems.