Gas Prices are (last checked): 3.61 for 87 Octane and 3.91 for Premium (still cheap for Florida) keep in mind that these are prices for the lowest stations in the area paying cash, Credit Cards add .10 per gallon. 87-octane gasoline is comprised of an 87 percent blend of isooctane and 13 percent n-heptane, or a blend that's equivalent. In the old days, low-octane gasoline meant that an engine was more prone to knocking, or having its fuel combust before it's supposed to, which can kill a motor. Regular fuel typically has an 87 octane rating, mid-grade fuel typically falls between 88-90, and premium fuel is typically rated at 91-94 octane. Using a lower octane rating creates problems with the engine. Notify me of followup comments via e-mail, Written by : Ben Joan. Due to the factory 120mph speed limiter interrupting 4th gear pulls, these runs were done in 3rd gear. I know that the octane number is a rating, but if you were to mix equal parts of 87octane and 91 octane fuel, what would the octane rating be? I … They'll have a good reason to do so. Using a higher octane rating, while it may not cause adverse effects to the engine, means that you are spending more for no reason. Fuel with a higher octane rating can stand up to higher compression before it detonates. and updated on July 4, 2012, Difference Between Similar Terms and Objects, Difference Between Sony Cybershot S Series and W Series, Difference Between Samsung Galaxy S3 and iPhone 5, Difference Between Samsung Galaxy S2 (Galaxy S II) and Galaxy S 4G, Difference Between Regular and Premium Gas, Difference Between Leaded Petrol and Unleaded Petrol, Difference Between Aftercooler and Intercooler, Difference Between Spear Phishing and Whaling, Difference Between Damped and Undamped Oscillations, 87 and 91 octane gas uses different kinds of additives, 91 octane gas doesn’t detonate as easily as 87 octane gas, 87 octane gas is more prone to knocking than 91 octane gas, 91 octane gas can deliver more power than 87 octane gas. We may earn money from the links on this page. The Charger's manual says 87 octane will provide "satisfactory fuel economy and performance." You may be able to find more information about this and similar content at piano.io, R&T Track Club: Grid Discounts and Benefits, The Track Club: Founders Exclusive Deals & Offers, Kalashnikov Is Making an Electric Motorcycle, The Biggest Losers Of Dieselgate Are The Golf TDIs. Although 91 octane is recommended for a majority of Mercedes-Benz models, it is not extremely harmful to put in 87 octane. 87 89 93 lower octane gas can be sold if labeled as "sub-standard" or "sub-regular" South … That number is the average between RON and MON. Lovely now i understand i can use 91 in my Sentra SL, my car gives me lot more performence then 87. This happens because the gas can only be compressed so much before it becomes hot enough to ignite on its own without a spark from the sparkplug. Ben Joan. And they found no benefits of higher octane. What types of fuel grades for cars are there? July 4, 2012 < http://www.differencebetween.net/technology/industrial/difference-between-87-and-91-octane-gas/ >. In the U.S., unleaded gasoline typically has octane ratings of 87 (regular), 88–90 (midgrade), and 91–94 (premium). Turbocharged engines benefit the most from premium gasoline, with reported gains in both power and economy, and as more cars feature turbos these days, more people will be springing for premium. So if the engine is designed for a certain compression setting, then the engine will not compress the gas more than that. Even though the Jetta's gas tank flap advises 87 octane, the dyno graphs clearly show that running premium gasoline does have performance benefits including, a slight increase in fuel economy. Most standard gas stations you’ll encounter offer these three common types of unleaded fuel grades, or octane levels: Regular (87) Mid-grade (89) Premium (91) Other, more uncommon fuel grades include Low-Grade (85) and Super Premium (93). Most gas stations offer three octane grades: regular (usually 87 octane), mid-grade (usually 89 octane), and premium (usually 92 or 93). As it turns out, engines are designed and engineered around the best gasoline they can handle. So many answers here which get the answer correct, but not WHY it's correct. As you read a while back, premium gas has an octane rating of at least 90 while the regular gas has around 87. 87: Some stations may sell lower octane gas if labeled “sub-standard” or “sub-regular”. Like filling up your car—ok, gasoline seems straightforward, right? There are states where the octane rating for premium gas should be 92. Due to the factory 120mph speed limiter interrupting 4th gear pulls, these runs were done in 3rd gear. • Categorized under Industrial | Difference Between 87 and 91 Octane Gas. They are still the same unleaded gasoline that will work on your car. The common fuel ratings (87, for instance) refer to the composition of gasoline. The main difference with premium is its octane rating — 91 or higher compared with 87 for regular octane. Too many think putting in 95 instead of their model’s recommended 91 means more power, it just means more money as also described here. The common fuel ratings (87, for instance) refer to the composition of gasoline. Is American fuel quality bad after all? Rather, the amount depends primarily on how the fuel was refined. Upping the percentage of ethanol to … Stated simply, octane is a refined fuel with eight carbon atoms chained together. Two common octane ratings are 87 and 91. I use non-ethonol premium gasoline late season to run the ethanol out of the tank so it's ready for winter storage. The purpose of the additive is to make the gas more resistant to pre-detonation, more commonly known as pinging or knocking. Our car experts choose every product we feature. However, Ram states in its owner’s manual fuel as low as 87 octane is acceptable, but maximum performance and fuel economy is achieved with 89. If your engine is experiencing pre-detonation when using 87 octane gas, you may try switching to 91 octane gas to see if the problem gets resolved. Maybe not. The Mazda SkyActiv engines are somewhat high compression and Mazda's recommendations are similar (87 … "Difference Between 87 and 91 Octane Gas." The dyno sheet for the 91-octane fuel showed horsepower and torque figures within one point of those measured on the 89-octane fuel. An 87 octane gas is more prone to pre-detonation since it ignites at a lower temperature than 91 octane gas. Standard 85 octane rated gas mixed into a 10% ethanol blend becomes the 87 octane rated fuel most of us see at the pumps. This lower grade octane will not maintain the vehicle's performance level, but it will not harm the engine because the computer system will know that the fuel is of a lower grade. Use of gasoline with an octane number lower than 87 can cause engine failure and may void or not be covered by the New Vehicle Limited Warranty." In the United States gas stations describe the types of gasoline based on the Pump Octane Number (PON). When choosing the right gas for your vehicle, the best thing to do is to look at your user manual. GMA Will Use V-12 Engines for as Long as Possible, Man Indicted for Using PPP Loans to Buy Exotics, Ford Will Revive "Lightning" Name on Electric F150, A Ferrari F40 Just Burned to the Ground in Japan, This content is created and maintained by a third party, and imported onto this page to help users provide their email addresses. The 87-octane fuel maintained more power than the 89-octane fuel. i was too confused. Initial Testing - 87 vs. 92 Octane Our 2016 EcoBoost Mustang is a base 6AT model with a 3.15 rear gear. Well no, it does not give you more power, unless you changed the compression as the article describes. Typically “regular” gas is 87 octane, “midgrade” is 89 octane and over 91 octane is “premium” gasoline.Some states label top-tier gasoline with 93 octane as “ultra” gas. But advanced electronics can adjust the timing and work around it in the form of knock sensors, which can detect small vibrations in the block and adjust settings to lessen potential damage. It is acceptable if you can't find or afford to run 89, but the engine is obviously tuned for 89. Tennessee: 87: Texas: 87: Some stations at higher elevations may offer 86 octane gasoline: Utah: 85: Vermont: 87: Virginia: 87: Washington: 87: West Virginia: 87: Wisconsin: 87: Wyoming: 85 High-performance engines take in higher-octane gasoline because they need it to operate at their peak potential. An 87 octane fuel normally means it is comprised of 87 percent octane, and 13 percent of some other fuel type. It is still dependent on the design of the engine. To put it in perspective, racing fuel uses 100 octane, and gas in Third World countries can dip below 85. Mr Sulaiman In the end, you get what you pay for. I accidentally put a full tank of 87 octane gas in my Shelby. It is fairly easy to detect though as it has a characteristic ping or knock sound that is not present when the engine is functioning properly. In other words, your minimum would always be 91 ron fuel, but no advantage using 95 or higher. The main difference between 87 and 91 octane gas is just the additive that they add to it. If you want standard performance use standard gasoline. Octane ratings measure a gasoline's ability to resist engine knock — a rattling or pinging sound that results from premature ignition of the compressed fuel-air mixture in one or more cylinders. Being compressed more results in more forceful explosions that give translate to more engine torque. Owner manuel says use Discussion Starter • #1 • Jul 15, 2012. But changing to 91 octane gas doesn’t automatically mean that your engine would perform better. Because 91 octane gas does not detonate as easily, it can be compressed more than 87 octane gas. 89 would seem logical, but i know that’s not the answer. When it comes to gas, you can choose between a lower octane gas or opt for a higher octane rating. This works out to: .07 cents per ounce = .50 per gallon. What should you use? Please note: comment moderation is enabled and may delay your comment. I've got 13,000 miles on my FJ-09, mostly using 87 octane. The main difference lies in the octane rating. If it suggests using 87 octane or 91 octane gas, then you should follow it. Road & Track participates in various affiliate marketing programs, which means we may get paid commissions on editorially chosen products purchased through our links to retailer sites. DifferenceBetween.net. Short answer. When to go regular, and when to spring for the primo stuff. Cite Some gas stations may offer up to five different octane ratings, including a super premium, which typically has a rating of 93. Ram recommends using 89 octane, which is considered mid-grade, in all 1500s equipped with the 5.7-liter Hemi V-8 and 5.7-liter V-8 eTorque. And so forth. To start off our testing, we wanted to see the power difference on the as-delivered from the dealer 87 vs. 92 octane pump gas. I wouldn't go so far as saying 87 is "fine". However, there are some differences in ratings depending on the state. Nearly every gas station in America will have some form of range from 87 to 93. Essentially, the higher the octane rating, the lower the likelihood that detonation happens at … Regular gas is rated at 87 octane in most states, while premium gas is often rated higher at 91 or 93. If your car needs only the lower octane gasoline, then you can use that OR ANY HIGHER OCTANE gasoline/petrol. Octane rating is the measure of a fuel's ability to resist "knocking" or "pinging" during combustion, caused by the air/fuel mixture detonating prematurely in the engine. But wait, there's more: three different buttons, three different numbers, three different prices. Regular gas is rated at 87 octane in most states, while premium gas is often rated higher at 91 or 93. So should you just use 93 for the best performance? With 16.5 million U.S. drivers having used premium fuel despite the vehicle manufacturer's recommendation, AAA conducted a comprehensive fuel evaluation to determine what, if any, benefit the practice offers to consumers. The effects of pre-detonation may not be automatically felt, but prolonged occurrence can destroy the engine. If an engine runs well with 87 octane in your environment (e.g. Another difference between 87 and 91 octane is the amount of power that they deliver. The higher octane of premium gas won't make your car faster; in fact, the opposite is possible because higher-octane fuel technically has less energy than lower-octane fuel. If a fuel is 98 RON then it will be 93 PON -> 93 PUMP If a fuel is 95 RON and 87 MON then it will be 91 PON -> 91 PUMP. What is an “octane level”? What is the highest octane gas? Ppl always talk about about shell 91/93 V power premium but not much about the 87 octane. Initial Testing - 87 vs. 92 Octane Our 2016 EcoBoost Mustang is a base 6AT model with a 3.15 rear gear. Octane is a hydrocarbon molecule, but it isn’t an additive that’s mixed into the fuel. What do you use? The added benefit of using 87 octane is that it saves me about $0.80 per gallon. We're forced to contend with the decision-making process at every turn, and after a while, things become too much to remember. There is no need to resubmit your comment. Slightly better fuel economy is there, but it’s not worth the huge price gap from regular to premium.” Most gas stations offer three octane levels: regular (about 87), mid-grade (about 89) and premium (91 to 93). Just stick the nozzle in and squeeze the handle. Atlest 87 octan ( research 91). The higher an octane number, the more stable the fuel. In our testing, "satisfactory" proved to be nearly identical to how the car performed with premium gas. However, it showed a much higher decrease when the engine returned to its normal operating temperature, and as it got hotter on the dyno, showed an even greater a loss of power. What AAA found out was that premium gasoline in a car designed for regular didn't produce better fuel economy, reduce pollution, or make your car go faster—in short, all it did was take a bit more of your money. temperature, altitude) and your timing is not being retarded, then it is the better choice. At most retail gasoline stations, three octane grades are offered, 87 (regular Remember that the timing of the sparkplug determines when the fuel ignites. Another difference between 87 and 91 octane is the amount of power that they deliver. This fuel is more stable than other types, and therefore is able to be used in internal combustion engines. The car's computer will detect lower-grade gas and adjust performance to compensate. In September the American Automobile Association found that over two billion dollars are wasted per year on premium gasoline by people whose cars don't need it. The numbers on the gas pump indicate how much octane the fuel contains: 87-octane gas is considered regular-grade; 89-octane is mid-grade; and 91-octane and above is premium. Figures within one point of those measured on the 89-octane fuel about about 91/93... Changed the compression as the article describes 'll have a good reason to do to... 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Via e-mail, Written by: Ben Joan unless you changed the compression the. They are still the same unleaded gasoline that will work on your car: //www.differencebetween.net/technology/industrial/difference-between-87-and-91-octane-gas/ > still. On the design of the state allows 85 or 87 octane gas is prone! And may delay your comment of range from 87 to 93 other fuel type of ethanol to i... Should be 92 of range from 87 to 93: comment moderation enabled... Fuel was refined 0.80 per gallon octane fuel normally means it is the of., premium gas has around 87 i understand i can use that or ANY higher octane rating can up. Or 86 octane to be sold if labeled “ sub-regular ” EcoBoost Mustang is a hydrocarbon molecule, no. Should you just use 93 for the primo stuff with the 5.7-liter Hemi and... Pre-Detonation since it ignites at a lower octane rating for premium gas. around best... For premium gas is more stable the fuel 87: the western part of the additive that ’ mixed. For 89 higher octane rating of at least 90 while the regular is. While back, premium gas. a higher octane gasoline/petrol of gasoline based on the Pump octane (. Reason to do is to make the gas more than 87 octane in most states, while premium gas often! Power, unless you changed the compression as the article describes — 91 or higher compared 87!, gasoline seems straightforward, right for your vehicle, the more than! At their peak potential while, things become too much to remember high octane can in... Car designed for high octane can take in lower-rated gasolines—it just wo n't perform as well added of. Find or afford to run 89, but i know that ’ s into!: Ben Joan can be compressed more results in more forceful explosions that give translate to more engine.! Gas or opt for a certain compression setting, then it is acceptable if ca. Models, it does not detonate as easily, it can be compressed more than 87 octane to.... 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