Unleaded 88 vs 87 gas mileage. Luckily there are several independent gas stations that still have 87/89/92 octane leaded REAL gas. Gasoline with an octane rating of 85 is available in some high-elevation areas of the U. 2 mpg better (Civic averages in the mid-upper 30's highway) of course this was just curiosity. Dec 26, 2025 · Should you use unleaded 88 octane gas (also known as E15), which contains 15 percent ethanol, instead of standard 87 octane gasoline? Mar 31, 2025 · Unleaded 88, also known as E15, offers a compelling alternative to traditional gasoline, and many drivers are curious as to why 88 gas is cheaper than 87. Admittedly, a "butt-dyno" type test, but the Gulf was about 3. We have a Rutter's in town and they have top tier gas, but it's the most expensive at $3. The octane rating is prominently displayed in large black numbers on a yellow background on gasoline pumps. So, should you put it in your vehicle? That depends. In the U. 98. Now that you know it’s safe for most cars, Apr 6, 2023 · Today, we will explore the price difference between octane 88 and octane 87. But can it save you when it comes to fuel efficiency? Jul 8, 2021 · Here in Virginia 88 is 15% ethanol, and ethanol really isn't good for an engine. It’s designed to work with most gas engines made from 2001 on. 75 and unleaded 88 at $1. We also answer whether octane 88 is any better than octane 87. Also, would one provide more mpg than the other? Thanks Nov 20, 2023 · Reverted to my usual Shell 87 w/ethanol and again too the same trip under virtually identical conditions (traffic/temperature etc). Fundamentally, it comes down to the ethanol content, as Unleaded 88 consists of up to 15% ethanol, which is cheaper than pure gasoline. 88 Octane: Often classified as mid-grade, this fuel offers slightly better resistance to knocking, which can be beneficial for engines that require or recommend higher octane levels. Sep 21, 2021 · To be clear, E15, which is also called “Unleaded88,” is gasoline. However, you should always check the owner’s manual before using a new fuel. It’s 88-octane fuel that is refined with 85 percent unleaded gas and 15 percent ethanol. Are both of these safe for the GT-Line? The price difference seems way too large to be nearly the same mixture of gas to ethanol. Experts say it is safe and worth using if the price is low enough, but it may not suit some high-performance vehicles. You will have slightly lower fuel economy (miles per gallon) since unleaded 88 (E-15) has more ethanol than E-10 or pure gasoline, and ethanol has less available energy per gallon. Regular 87 octane gas is perfect for most standard vehicles, offering a cost-effective solution without compromising performance. Using a lower octane fuel than your vehicle requires can cause damaging pre-ignition, but using a higher octane fuel than required, like 88 instead of 87, will only provide a marginal benefit, if any. Nov 20, 2023 · Fuel mileage has been less, but I can't really be sure on that as the temperature has been dropping. It’s also compatible with flex-fuel vehicles. I get gas at KwikStar which offers unleaded 87 at $2. Learn how it affects your car's performance, fuel economy, and compatibility from Consumer Reports. In general, non-ethanol gasoline is more expensive than ethanol-blended versions. S. 10% I gotta live with cause its mandatory, but I'll pass on 15%. How Much Ethanol Is In 87 Octane Gas To get the required 87-octane grade, 10% ethanol is combined with lower-octane gasoline. Jul 7, 2022 · The difference is Unleaded 87 has 10% ethanol and Unleaded 88 has 15% ethanol, and is often sold for cheaper than regular, unleaded gasoline. . Dec 26, 2025 · Unleaded 88 gas (E15) contains 15 percent ethanol and may not be suitable for older cars. 75/gal. Oct 24, 2022 · Unleaded 88 fuel gives lower gas mileage than regular unleaded but with fewer carbon emissions. Learn what unleaded 88 (E15) is, which vehicles can use it, MPG changes, and why motorcycles and small engines should avoid it. Nov 25, 2022 · However, the greater expense of ethanol-free gas may outweigh the benefits of increased gas mileage. Oct 24, 2022 · Unleaded 88 is a higher-ethanol fuel that costs less and emits less carbon than regular gasoline, but has slightly lower gas mileage. 87 Octane: This is considered regular unleaded gasoline and is suitable for most vehicles designed to run on lower octane fuels. Oct 19, 2024 · Conclusion Choosing between 87 and 88 octane gas isn’t just about price; it’s about what’s best for your vehicle and driving habits. , unleaded gasoline typically has octane ratings of 87 (regular), 88–90 (midgrade), and 91–94 (premium). For most modern cars that utilize octane 87, unleaded 88 would be completely safe to use and should not damage your car. (more about that below).
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