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Discussion Starter · #1 ·
I've been using Shell Regular. I only use Top Tier gas but thinking about moving up to Premium if it would make a difference
 

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Discussion Starter · #4 ·
Hahaha, that was certainly definitive!
Premium is only 10 cents per gallon more by me but if it doesn't make a difference than that's that
 

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It won't make a difference because premium gas does not have any additional energy in it. It has more of the component ("octane") that is used to prevent the gas mixture from igniting too early under the increased pressure of higher ratio combustion chambers. Called knock, which can really harm the engine (and decrease mileage). It is not needed for this car. Period.
Using premium gas to improve performance is a myth that has been around for at least 70 years. And the gas companies have helped push the idea, they make more on premium, as the additional additives do not add up tot he in creased price. There are cars that need higher octane levels to run properly because of their design. It is not needed for this car. Period. Buying premium for a car that is designed to run on regular is throwing money away.
I know this is a touchy issue for some out there who want to believe otherwise. I challenge anyone who thinks they do better in these cars on premium to do a double blind test and see if they can discern any difference. And better yet, that test needs to be done by professional drivers with no personal interest in trying to establish a difference.
 

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In our area, we have Shell, Exxon, BP, and Chevron. I try to use Shell regular in our 2.5, but will occasionally use BP if Shell is not available. I DO NOT use grocery store gas (Kroger), convenience store gas (Mapco), or discount gas (Swifty, Thornton, and other various independents). I have used mid-grade and premium, but found no difference in mileage or performance.
 

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It won't make a difference because premium gas does not have any additional energy in it. It has more of the component ("octane") that is used to prevent the gas mixture from igniting too early under the increased pressure of higher ratio combustion chambers. Called knock, which can really harm the engine (and decrease mileage). It is not needed for this car. Period.
Using premium gas to improve performance is a myth that has been around for at least 70 years. And the gas companies have helped push the idea, they make more on premium, as the additional additives do not add up tot he in creased price. There are cars that need higher octane levels to run properly because of their design. It is not needed for this car. Period. Buying premium for a car that is designed to run on regular is throwing money away.
I know this is a touchy issue for some out there who want to believe otherwise. I challenge anyone who thinks they do better in these cars on premium to do a double blind test and see if they can discern any difference. And better yet, that test needs to be done by professional drivers with no personal interest in trying to establish a difference.
+1 Only regular here.
 

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Discussion Starter · #10 ·
The only car I've researched that does better on premium is the Cruze and Sonic with the 1.4l Turbo. They recommend 87 octane or above though. Whenever I see that the engine's almost always will run on 87 but run better on higher octane.
 

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The only car I've researched that does better on premium is the Cruze and Sonic with the 1.4l Turbo. They recommend 87 octane or above though. Whenever I see that the engine's almost always will run on 87 but run better on higher octane.
03-07 Accord V6's would give a slight bump in power without tuning if you switched to premium after a few tanks. Most vehicles would not see any performance bump though.
 

· Admiral Obvious
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chevron, 76, valero, and surprisingly Vons 91. no KR above 1.0 on those brands with Cobb So.Cal Tune
 

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I use shell or chevron only, my butt dyno says chevron gives me more power and lasts longer.
 

· zoom~
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Chevron or Shell up here in Canadia, other brands give no grunt.

having said so, there are still inconsistency in ze le butt dyno.
 
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