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NO, it does not... there has been a lot of mis-conception about this topic and being an engineer have been told several times, and have indeed mathematically shown that octane does not affect the efficiency of the engine. the octane rating is simply a rating that shows a fuels resistance to detonation and nothing more. You can confirm this by doing a little research on the Otto cycle (4 stroke standard gas engine) and understanding that when 93/98/87 octane fuel is burned, it releases the same amount of energy. the reason that this myth probably exists, is because higher performance (and higher efficiency) engines use higher compression ratios and have a tendancy to detonate lower octane fuel (knocks). also takes longer for the gas to ignite.
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∙ 15y ago
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Is there an advantage of using 95 octane over 91 octane?
If vehicle does not "ping" severly on acceleration - no advantage
If a car has been given a certain type of gas for a long time would it hurt to start giving it different type of gas?
It would only hurt if the car required 89 octane or 92 octane and you went to a lesser octane. Those cars are engineered to run on a higher octane. A car engineered for the lower 87 octane might actually see some performance improvement by going to a higher octane once or twice, because the higher octane will help to clean the injectors a "little". Not much though. Over all there is no real significance to using the higher octane. The higher the octane level, the "richer" or "heavier" the fuel is. So if the car is not manufactured for the higher octane, you will eventually cause carbon build up at a faster rate than normal.
Where can you get proof of mileage for your car?
You Can Get a HPI check which is easy to do, it's all over the web, it will cost about £20.00. It will tell you what the milage of a car was the last time it was serviced. That way if the milage of the service was 20,000, and the owner said it's 16,000 , you know that the milage has been tampered with.
Does compression ratio effect octane requirements?
Yes, the higher the compression ratio, the more octane the fuel has to be. Anything over 10.0:1 has to be 91 or higher. However, if performance is not an issue, than you can use any type of fuel you want, but car will not accelerate fast and its torque curve will be very bad. Using low octane fuel in a high compression engine will also cause knocking (pinging, pinking). This will cause damage if continued.
Are there any issues with using regular gas vs premium gas in the Buick 3800 Supercharged engine?
Right. If it calls for Higher Octane, use it. :) Unfortunately yes. ...that is...if you FLOOR it... High boost, and load need a higher octane, so as not to "ping" which can cause damage over time.. good luck dave I have a 1996 Buick/Riviera _Supercharged Owners manual recommends using premium fuel, if supercharged. I put "regular gas" in by mistake & It wouldn't go over 55 MPH. Gil Raker I haven't noticed any difference, at least as of yet. With the high price of gas now I am using regular in my 98 Riviera, and every once in a while I will fill it with Premium. I have been told by a friend who works at a Refinery, that in the winter, you can use the "winter gas" regular. They have to make it a higher octane, but they don't tell you that. It will not cause any ping. It has something to do with Government standards. However, he does recommend using the Premium in the summer as it is made with the lower octane, especially if you do notice it is pinging. This is a common misconception that ... However ... is simply not true. The compression of you engine determines what octane fuel you should run in the engine. Follow the recommendations in your owners manual. If it says to use 87 octane, then using a higher octane will not improve performance, MPG, or in any other way, help. If however your engine requires, 89 or 91 octane, then using a lower octane than recommended may cause pinging, and pinging can cause engine damage. The exception to this are some of the modern computer controlled engines of today. An engine requiring 91 octane may indeed be able to burn 87 octane but at a penalty in MPG & power. The reason for this is that the computer will readjust the fuel air mixture and the timing to compensate for the lower octane fuel. This will prevent pinging, but at a penalty. It is simple, burn what is recommended by the people who built the engine, no more and no less. Do not listen to people who tell you that high octane fuel will help performance or mileage in a engine designed for 87 octane. It is a myth that still persists today. Even some car guys who should know better believe this. A ll you are doing is wasting your hard earned money. If the car recommends premium gas, you can get by using 87 octane, you will just lose a little performance and fuel economy. It's been proven though that your savings in gas costs when using the lower octane are greater than your savings when using the proper premium and paying more. Older cars didn't have the engine management to change the timing on the car to get rid of pinging (knock boxes), so it was bad on the engine. If the engine requires premium, use it. If it recommends it, use it if you want to.
What kind of fuel do you use in a 4 stroke motor?
For area that have 10% ethanol in their gas, its best to use 89 octane. There is less ethanol with higher octane. The 87 octane with ethanol really takes a toll on the float seal, just eats it up. Ethanol tends to have a little more water in the fuel over time. I know several people that use 93 or 94 octane for the mowers. That is over kill and 89 will be fine.
Can you run high octaine fuel?
It depends on the type of engine and how high of octane you are running. Octane slows the burning of fuel, so if it is too high of octane for the engine, you will end up burning out your exhaust valves because burning fuel is being pushed out of them. 92 or 93 octane that is available at fuel pumps as "premium" fuel is ok for most engines. I wouldn't run anything over about 100 octane.
Is there a problem when you mix super premium gas with other type of gas to your engine tank?
No it is not a problem but not necessary. You should use exactly what the manufacture recommends. Using a higher octane fuel in a car designed for 87 octane will provide no benefit whatsoever and is a total waste of money. However using a lower octane fuel in a car designed to run on premium will lower the power of the engine and decrease fuel mileage. With todays modern fuel management systems the ECU in the vehicle will make the adjustments for the lower octane fuel. However on an older vehicle designed to run on premium using regular can cause engine damage over time due to pre-detonation or what is comely called pinging. This is real simple, use exactly what the manufacture of your vehicle recommends and you cannot go wrong.
If 91 octain is required will using 89 or 87 octane damage the engine?
it can over time, octane ratings tell you how easly the gas ignites under pressure, the lower the rating the easier it ignites. higher preformence engines have higher compression and without the right gas the extra pressure can cause the gas to ignite early resulting in engine knock.
What makes a motor ping when you give it gas?
Low octane fuel, Incorrect timing, Over heating,
What do sports cars run on?
Generally a Sports car is a higher than normal performance vehicle so Premium or high octane fuel is recommended.Race cars use racing fuel ( over 100 octane )
How many miles to the gallon does a 93 lebaron get?
i have a 3.0 4 speed auto with over 220,000 miles on it and i get 21 mpg using 87 octane gas, also, i could use a tune up and it burns oil like they all do
