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Old December 15th, 2012, 11:34 AM   #1
Catnip 0_o
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Default Premium/Plus/Unleaded?

Which gas do you guys prefer and get at the pump? Besides difference in price, is there really a difference at all in the actual gas itself? A buddy of mine told me that both plus and premium are higher octane which gives you more power and is better for your engine, but I started using premium fuel and to be honest I haven't noticed any difference in fuel mileage or power. I'm almost wondering if the gas stations just say plus or premium to tell you its better and its really not, and its actually just the same as unleaded to get you to pay an extra buck?

So what is your guys/gals opinions on the different types of gas and what one do you go with and why?
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Old December 15th, 2012, 11:57 AM   #2
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Wow....

If your vehicle doesn't require premium or a higher octane fuel then there's no gains to be realized. Google octane v compression ratio

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Old December 16th, 2012, 04:54 PM   #3
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The only time I do not buy regular is when I am driving around something supercharged.
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Old December 16th, 2012, 05:19 PM   #4
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Your buddy is a knucklehead. He probably runs E3 plugs and has a tornado insert on his intake too.. Run 89 or you are wasting money. Stations do list the higher octane fuels as premium or super and ect to get idiots to pay more for no reason.
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Old December 16th, 2012, 06:07 PM   #5
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Fuel mileage gains can be had with higher quality fuel.
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Old December 16th, 2012, 06:29 PM   #6
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Lower octane fuel ignites easier, which is why you get detonation when running low octane fuel in an engine that has higher compression, or boost.
I think that if it doesn't rattle, and spark is not being pulled by the computer, then you don't need the higher octane fuel.
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Old December 16th, 2012, 08:03 PM   #7
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Quote:
Originally Posted by GREASYHANDS View Post
Fuel mileage gains can be had with higher quality fuel.
If your vehicle doesn't require premium you're not going to see any gains by running premium....it's pretty simple thermodynamics

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Old December 16th, 2012, 08:07 PM   #8
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Alot of time you will actually get a decrease in performance and mileage with higher octane in a low compression engine.
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Old December 16th, 2012, 08:49 PM   #9
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If your vehicle doesn't require premium you're not going to see any gains by running premium....it's pretty simple thermodynamics

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Never said nuthin bout that. Quality fuels is quality.
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Old December 16th, 2012, 09:13 PM   #10
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Quote:
Originally Posted by ajmorell View Post
simple thermodynamics
Is that an oxymoron?
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Old December 16th, 2012, 09:24 PM   #11
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Never said nuthin bout that. Quality fuels is quality.
I will agree with you there. I could definitely track a difference between cheap fuel and quality fuel such as Chevron

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Old December 16th, 2012, 09:27 PM   #12
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I have gas
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Old December 18th, 2012, 12:36 PM   #13
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I only run premium lead gas in all my mowers.
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Old December 18th, 2012, 12:46 PM   #14
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Run this and you'll get an extra 10hp guaranteed.

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Old December 18th, 2012, 01:02 PM   #15
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Well shoot if they are all the same just advertised to get an extra buck, I might as well just run unleaded mix in my 2stroke dirtbike!

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Old December 18th, 2012, 03:39 PM   #16
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Well shoot if they are all the same just advertised to get an extra buck, I might as well just run unleaded mix in my 2stroke dirtbike!

You run leaded gas in your dirt bike?
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Old December 18th, 2012, 03:53 PM   #17
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I started running mid grade in my truck back in August, i went from 11.5 to 12.3
That's a pretty good increase.
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Old December 18th, 2012, 03:57 PM   #18
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I started running mid grade in my truck back in August, i went from 11.5 to 12.3
That's a pretty good increase.
I run midgrade also and saw a slight increase and in my town at one gas station its the same price as regular.
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Old December 18th, 2012, 04:14 PM   #19
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Hasent this been shot to death on here before. adding octaine is for higher compression engines, it burns slower reducing spark knock nothing else. If you drive an older vehicle it may be you have built up carbon in the combustion chamber(not likely) that would be the only reason for more power with higher octaine. your compression is higher than manufacturered. if thats the case take it to a shop and they can add some water to the air fuel mix ( a little with a hose) to wash out the carbon.If the manufacturer recomends regular fuel, then you are waisting you money. period. from a licenced mechanic for some 30 years

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Old December 18th, 2012, 04:28 PM   #20
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I just wish they would quit putting bullshit in our gas. I had to run expensive "rec 90" this summer for my boat and every other carberated engine i own because of the stupid ethanol blended gas.
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