unless your car is tuned to take advantage of the higher octane, it will not make a difference.
if your car says "premium fuel only" or something similar, it might be because you have a supercharger, turbocharger, or advanced spark engine, if this is the case, i would highly reccomend premium fuel, as it isn't THAT much more expensive anyway..
2007-10-09 07:16:37
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answer #1
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answered by Anonymous
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About 98% of the cars today run on 87 octane unleaded.
This is because most of today's cars have a compression ratio of about 8.5 to 1. 87 octane fuel is about all you need for this much compression. There is no advantage to using any higher octane fuel in an engine that doesn't require it. All you are doing is giving unnessessary money to the oil companies. I think they already make enough. Any improvements in performance or fuel milage would be minimal or non-existant in a low compression engine. If you were to do the math, any fuel milage gaines would not even come close to offsetting the additional cost of the fuel.
High performance, high compression engines require more octane. This is to prevent spark knock (detonation). Detonation is a condition where the fuel air mixture burns before the spark plug fires. This premature firing can cause severe damage to the valves and pistons. The extra octane prevents this. Only if your engine has more than 10 to 1 compression, you need to use the higher 92 octane or better premium fuel.
To be sure, check your owner's manual or ask your dealer.
2007-10-09 14:19:35
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answer #2
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answered by Mad Jack 7
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The super has a cleaner burn but it all depends on mainly how old or new your car is. I have an 88 Cavy Z24 and I only put unleaded in it. Thats what they are made for, I don't put any super or premium in it at all. And my fiance is a genius with cars and he tried super in his 86 cadillac and it vapor locked from the stupid stuff. It may be cheaper but it is not worth it for the older cars. 1995's and up, sure.
2007-10-09 14:20:49
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answer #3
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answered by Anonymous
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Stick with manufacturer's recommendations.
The only time I use the premium is when there's extremely cold temperature, such as in winter. I will fill up occasionally with the good stuff, it does make a difference when starting.
I live in PA, winter low is sometimes 15-20 degrees, but when zeroes are in the forecast, I'll get some premium.
2007-10-09 14:21:21
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answer #4
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answered by TedEx 7
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Use the higher grade stuff if the manufacturer recommends it or if your car has a knock sensor.
Otherwise it's not going to do anything for you.
You ask a question without giving, Make, Model, Year, Engine type/size so you're not going to get a good answer.
2007-10-09 14:19:44
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answer #5
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answered by hsueh010 7
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the first and second guys were right high octane is for high compression engines, it actualy burns slower to prevent detonation from heat during the compression stroke ,it will not make your intake or exhaust sound any different or make more power like some commercials claim
2007-10-09 14:38:23
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answer #6
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answered by fronkkei 2
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a higher rating of octane, costs more, but if ur car is running rough, or theres a noise in the engine, you can put higher octane in it, to stop the clinging or whatever...
i use 93 most of the time, and it makes the intake and exhaust sound way better..
2007-10-09 14:20:06
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answer #7
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answered by Robert D 3
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Get the gas that your car's owner's manual recommends. Depending on your car, it may or may not run any better on high-octane fuel.
2007-10-09 14:20:09
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answer #8
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answered by drshorty 7
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It depends on the kind of car you have and how well you want to maintain it.
2007-10-09 14:22:32
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answer #9
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answered by Kansas Z 6
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