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Discussion Starter · #1 ·
ok so im wondering what you guys are running for fuel... i run 93 octane and it is impossible to get ethanol free fuel in the texas dfw area unless i run race fuel. i am however thinking of getting some 114 octane and mixing it half and half with premium gas and running it. i do that in my 2 cycle dirt bike and its a noticeable difference on that machine.... however it is only a 240 lb machine, where as the ace is 850 lbs. but im interested to see what other people are running in their 330s and 570s...
 

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I have wondered this same thing. I add stabilizer every time I add fuel. I'm running 93 as well.
 

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ok so im wondering what you guys are running for fuel... i run 93 octane and it is impossible to get ethanol free fuel in the texas dfw area unless i run race fuel. i am however thinking of getting some 114 octane and mixing it half and half with premium gas and running it. i do that in my 2 cycle dirt bike and its a noticeable difference on that machine.... however it is only a 240 lb machine, where as the ace is 850 lbs. but im interested to see what other people are running in their 330s and 570s...

I use whatever is available. Mostly 87 with a little corn blend. These new machines don't need premium or ethanol free fuel, so I'll save my pennies and use what is recommended. Why are y'all using premium and RACE fuel? Premium fuel can actually cost you horsepower unless your machine is made to use it. It burns slower to keep a high compression engine from knocking. Unless you have done engine work or have a tuner that lets you increase timing considerably, IMO your wasting your money. Not trying to start a war here but many use Premium thinking its a magic cure or a snake oil for extra horsepower and its neither. The lowest octane your engine can run without knocking is what you should be using, and that fuel will achieve your best burn and best performance in a stock engine. As far as the ethanol, the engines of today are made knowing that they will be fueled by 10% ethanol and no harm will come by using that fuel. Yes if you let your machine sit over long periods of time throw some seafoam in it or any other good additive but I would do that for ethanol free gas also if left sitting for a long time. Use what makes you happy but remember Polaris doesn't tell us to use anything other than regular, they made the engines and should know what fuel they require
 

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I use whatever is available. Mostly 87 with a little corn blend. These new machines don't need premium or ethanol free fuel, so I'll save my pennies and use what is recommended. Why are y'all using premium and RACE fuel? Premium fuel can actually cost you horsepower unless your machine is made to use it. It burns slower to keep a high compression engine from knocking. Unless you have done engine work or have a tuner that lets you increase timing considerably, IMO your wasting your money. Not trying to start a war here but many use Premium thinking its a magic cure or a snake oil for extra horsepower and its neither. The lowest octane your engine can run without knocking is what you should be using, and that fuel will achieve your best burn and best performance in a stock engine. As far as the ethanol, the engines of today are made knowing that they will be fueled by 10% ethanol and no harm will come by using that fuel. Yes if you let your machine sit over long periods of time throw some seafoam in it or any other good additive but I would do that for ethanol free gas also if left sitting for a long time. Use what makes you happy but remember Polaris doesn't tell us to use anything other than regular, they made the engines and should know what fuel they require
I argued these same points with a buddy of mine who's been driving newer quads for longer then me and he said that is what he recommended because it's a "better fuel" but I was kinda thinking along your lines. When my boat was new a sign on it said to run premium. It ran terrible with a knock until I took it in and they told me to run regular.
 

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Discussion Starter · #5 ·
Well vandal, I definetly don't want to start any wars and I always value Input from anyone regardless of your opinion or stance. And I'm no petroleum engineer but I run premium because it stays stable longer and is a better burning fuel in my opinion, I had a 2003 dodge with a 360 and I picked up 3 mpg from switching to premium in a factory engine. And I have always been told that higher octane is resistance to ignition from compression. It doesn't burn slower it actually burns faster and cleaner. Also I run the race gas because race gas is chemically engineered to stay atomized and suspended in the air to ensure a good fuel air mixture. Which is why they are so particular of the gas pumps that sell race fuel and air plane gas, the gas that you buy at you neighborhood gas station is actually "detuned" you could say, but it's engineered to be safer for all the retards that smoke at the pump or don't consider that static electricity can ignite high quality fuel, there is reason they make you ground your fuel cans at the fuel depots that sell av gas(air plane fuel) and race gas. A friend of mine buys av gas as a cheap alternative to race fuel while he tests and tunes his drag car, I have actually seen the airport security escort a man off the airport for not grounding his fuel can and leaving it in his truck while he fueled his can up.
 

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Discussion Starter · #6 ·
Unless you live in a non emission county you get a lower quality of fuel than what you would in a non emission county, which is determined by population density, or at least that's how it is in texas.
 

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I argued these same points with a buddy of mine who's been driving newer quads for longer then me and he said that is what he recommended because it's a "better fuel" but I was kinda thinking along your lines. When my boat was new a sign on it said to run premium. It ran terrible with a knock until I took it in and they told me to run regular.
Vinny....premium fuel isn't better its just a different blend, made for a different application. It doesn't make an engine run better just quieter if the engine is designed for it. High horsepower high compression engines need it or they can also use E-85 because E-85 has a higher octane rating than gasoline, burns faster and cleaner than gasoline, but isn't near as efficient for mileage. These flex-fuel vehicles don't get near the mileage when using E-85 over gasoline
 
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Discussion Starter · #8 ·
Vinny....premium fuel isn't better its just a different blend, made for a different application. It doesn't make an engine run better just quieter if the engine is designed for it. High horsepower high compression engines need it or they can also use E-85 because E-85 has a higher octane rating than gasoline, burns faster and cleaner than gasoline, but isn't near as efficient for mileage. These flex-fuel vehicles don't get near the mileage when using E-85 over gasoline
I'll agree with you on the e 85, but I still believe premium is a better fuel, but just my opinion and I'm not a professional
 

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Vandal, I haven't seen it actually recommended by Polaris that we use regular 87. Is this in the owners manual, a service manual, or just what the dealer said?
 

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For those wanting ethanol free gas go to pure-gas.org and they have a map of all the places you can get ethanol free gas.


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Vandal, I haven't seen it actually recommended by Polaris that we use regular 87. Is this in the owners manual, a service manual, or just what the dealer said?
I was told to run regular by one of the Polaris technicians where I bought my ACE. You can use anything you want but you will get no advantage over regular by switching to premium fuel. Whitetrash.....it is common knowledge that higher octane fuels burn slower and that is what keeps high compression engines from knocking. Believe me....if high octane fuel would make a difference in the way my ACE performed I would use it, but it wont, so I dont
 
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Well vandal, I definetly don't want to start any wars and I always value Input from anyone regardless of your opinion or stance. And I'm no petroleum engineer but I run premium because it stays stable longer and is a better burning fuel in my opinion, I had a 2003 dodge with a 360 and I picked up 3 mpg from switching to premium in a factory engine. And I have always been told that higher octane is resistance to ignition from compression. It doesn't burn slower it actually burns faster and cleaner. Also I run the race gas because race gas is chemically engineered to stay atomized and suspended in the air to ensure a good fuel air mixture. Which is why they are so particular of the gas pumps that sell race fuel and air plane gas, the gas that you buy at you neighborhood gas station is actually "detuned" you could say, but it's engineered to be safer for all the retards that smoke at the pump or don't consider that static electricity can ignite high quality fuel, there is reason they make you ground your fuel cans at the fuel depots that sell av gas(air plane fuel) and race gas. A friend of mine buys av gas as a cheap alternative to race fuel while he tests and tunes his drag car, I have actually seen the airport security escort a man off the airport for not grounding his fuel can and leaving it in his truck while he fueled his can up.
The reason higher octane burns slower is to keep an engine from firing to quickly before the compression stroke is completed. When that fuel burns too fast and ignites before the piston is all the way up it causes piston slap or what is commonly called pre ignition or pre detonation. Lower octane fuels burn much faster because in most vehicles their lower compression ratios don't have a tendancy to actually ignite before the compression stroke is completed, where a high compression motor can actually ignite fuel from the compression alone, much like a diesel does......so if that scenario is true and I know it is, we don't need premium in our atvs because we don't have compression ratios high enough to need high octane fuel. But like I said before if you want to use it or feel more comfortable using it, by all means do. It wont hurt your machine but it wont help it either. If you get a power commander I would probably recommend it, since it will no longer have the factory tune and probably have more timing advance, and whenever you change timing any bit of insurance is always a good thing. Good riding Whitetrash
 
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Vandal, I haven't seen it actually recommended by Polaris that we use regular 87. Is this in the owners manual, a service manual, or just what the dealer said?
Vinny, a friend of mine just told me that page 28 of the owners manual says use 87 octane with or without ethanol but no more than 10% ethanol
 
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When refueling, always use either leaded or unleaded gasoline with a minimum pump octane number of 87 R+M/2 octane. Do not use fuel with ethanol content greater than 10 percent, such as E-85
fuel.

Page 28
 

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I run 91 octane, ethanol free in all of my vehicles as much as possible. I never run any ethanol in my off-road vehicles or small engines, such as lawn mowers and chain saws. Ethanol is not good for small engines or engines not designed for it like my 88 Trans Am or any vehicle older than 2000. I've had many mechanics tell me that using ethanol in small engines destroys the fuel system. My car gets about 2-3 mpg better using ethanol free vs. 10% ethanol. Right now it doesn't make up the price difference but when gas gets to $3.50 or more it does. I used 10% ethanol in two push mowers and after three years one didn't not run well at and the other run but not well. The current one being 5 years old not using ethanol free runs just as good as new and never had issues. This isn't suppose to be "angry", it's what my experience as been.
 

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Higher octane gas has a lower flash point. It burns about the same temperatures, not necessarily slower so you don't really lose HP. It just doesn't ignite before the spark plug fires in high compression engines.
Shell did a test on their V-Power street gas and their V-Power race gas. There was very little difference in HP and speed, but there was a some difference.
Premium gas from the bigger oil companies have better cleaning agents in them also, which helps with a better injector spray pattern which gives better ignition which gives better power.
I work for Shell. I use any name brand 87 octane gas, they burn pretty clean too. If it is not needed or recommended, I don't use it.
I do run the V-Power every 4 or 5 tanks, just to keep things clean on all vehicles, but not my lawn mowers.
I think, but not sure, that a high revving engine like the Ace, should stay fairly clean because you are not lugging it at low RPM's causing carbon build up. It stays revved up so I am thinking it stays cleaner. Manual shift 4 wheelers sometimes have riders who won't downshift. They just lug around. This is not good for an engine over time.
 

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I have a 30 gallon gasoline caddy that I use as a source of fuel for my two mules, my Ace, my mower, my string trimmer, my blower and my chain saw. I have had to replace the carburetor on both my string trimmer and my blower because of damage caused by ethanol. I have a local source for ethanol free gasoline and that is what I use for everything. I don't think that the Ace requires it, but some of my other equipment does. I do treat the 30 gallons of gasoline with two cans of Sea Foam to stabilize the gasoline and keep the fuel systems clean. I bought a 2003 mule two years ago. I was not driven very much and only had 378 hours after 12 years of use. The fuel system was in bad shape and it would not idle smoothly and required a lot of choke and pumping of the accelerator pedal to start. After two tanks of the ethanol free gasoline with the Sea Foam, the mule runs great, idles great and only requires a small amount of choke to start.
 

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I use the 'pure gas' app on my phone. Enter your zip code and it gives a list of ethonal free pumps by milage near you. It is worth it to me to use it. My extra tank we take gets used very little, i have to force myself to use it every month to cycle it through. Or we use in lawn mower and the pressure washer. I get 12 to 26 gal at a time for the ace and small engines at home.
The comment on e85- it does not burn the same. If you loose gas milage, there is a reason. It does not burn as hot, less power which is why it burns more to achieve like 87 octane. I tried it in my titan truck, it sucked! If you don't have flex fuel burnable vehicle don't use it- its additives will eat the components in the fuel system.
Get the app- you will find ethonal free fuel.
Race fuel and hi octane is over kill or over thinking it.
Bottom line- the manual recommends regular gas. Ethonal free won't hurt. Hi octane may cause cylinder damage.
What ever is used-have fun.
 

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Higher octane gas has a lower flash point. It burns about the same temperatures, not necessarily slower so you don't really lose HP. It just doesn't ignite before the spark plug fires in high compression engines.
Shell did a test on their V-Power street gas and their V-Power race gas. There was very little difference in HP and speed, but there was a some difference.
Premium gas from the bigger oil companies have better cleaning agents in them also, which helps with a better injector spray pattern which gives better ignition which gives better power.
I work for Shell. I use any name brand 87 octane gas, they burn pretty clean too. If it is not needed or recommended, I don't use it.
I do run the V-Power every 4 or 5 tanks, just to keep things clean on all vehicles, but not my lawn mowers.
I think, but not sure, that a high revving engine like the Ace, should stay fairly clean because you are not lugging it at low RPM's causing carbon build up. It stays revved up so I am thinking it stays cleaner. Manual shift 4 wheelers sometimes have riders who won't downshift. They just lug around. This is not good for an engine over time.
However you want to say it......high test fuel ignites slower under high compression. When I talk about a slower burn this is what I mean. In a high performance engine with high compression premium will ignite slower to avoid engine knock where regular fuel can ignite way ahead of the compression stroke being completed, so I call that a slower burn for the premium fuel and numerous threads I have read on this subject call it that also. 6 of one half dozen of the other....same conclusion
 
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