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Gas Question
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amoffitt
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PostPosted: Wed Jul 13, 2011 3:40 pm    Post subject:  Gas Question Reply with quote

I was talking to a local shop because i was scheduling my car for an alignment. We were talking a little bit about things and we got on the subject of fuel milage. The gentleman told me to try mid grade gas because it has less ethanol in it than regular and that i might get better gas milage with mid grade than regular.. Can someone else confirm this or was he just feeding me bs?

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chibiblacksheep
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PostPosted: Wed Jul 13, 2011 4:00 pm    Post subject:   Reply with quote

BS. On the pumps they tell you that all grades usually have up to 10% ethanol.

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amoffitt
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PostPosted: Wed Jul 13, 2011 4:02 pm    Post subject:   Reply with quote

chibiblacksheep wrote:
BS. On the pumps they tell you that all grades usually have up to 10% ethanol.


Yea thats what i was thinking as well...

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ZSPOT
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PostPosted: Wed Jul 13, 2011 4:16 pm    Post subject:   Reply with quote

Around here, some of the "mid grade" fuel is simply 87 with more ethenol added to it,.. since ethenol has a higher octane rating then regular gas. Rolling Eyes

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amoffitt
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PostPosted: Wed Jul 13, 2011 4:19 pm    Post subject:   Reply with quote

ZSPOT wrote:
Around here, some of the "mid grade" fuel is simply 87 with more ethenol in it,.. since it has a higher octane rating then regular gas. Rolling Eyes


I figured all 3 grades of gas had the same amount of Ehanol in them just more octane. Thats why it kind of threw me off when he said that there is less ethanol in Mid grade than Regular.

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PostPosted: Wed Jul 13, 2011 4:35 pm    Post subject:   Reply with quote

unless he scanned the car while driving to watch for KR, then suggesting a higher grade is just wrong.

I know around here, all gas is 10% ethanol.

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amoffitt
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PostPosted: Wed Jul 13, 2011 4:38 pm    Post subject:   Reply with quote

Pitch Black SS wrote:
unless he scanned the car while driving to watch for KR, then suggesting a higher grade is just wrong.

I know around here, all gas is 10% ethanol.


He never drove it, he just told me this while I was talking to him. I told him it was pulling to the left when i had the wheel straight and that when i want the car to go straight i have to have the wheel a couple degree's to the right. I told him that i was losing a few MPG as of the last few months and he told me it was due to the heat. (I live in TX and currently its about 100 or so outside). That's when he told me to run mid grade gas to improve MPG.

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PostPosted: Wed Jul 13, 2011 5:29 pm    Post subject:   Reply with quote

amoffitt wrote:
I told him that i was losing a few MPG as of the last few months and he told me it was due to the heat. (I live in TX and currently its about 100 or so outside). That's when he told me to run mid grade gas to improve MPG.


This guy was talking out of his ass. You should get better fuel economy during the summer because the air being drawn into the engine is hotter (therefore less dense). It's the same concept as people that run an open cone in the engine bay as a HAI to increase fuel economy.

Hell, before I put my wheels on I could manage almost 34 MPG during the summer on my drive from Nashville to Chicago whereas during the winter I was lucky to hit 30.

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PostPosted: Wed Jul 13, 2011 5:39 pm    Post subject:   Reply with quote

IffyG wrote:
amoffitt wrote:
I told him that i was losing a few MPG as of the last few months and he told me it was due to the heat. (I live in TX and currently its about 100 or so outside). That's when he told me to run mid grade gas to improve MPG.


This guy was talking out of his ass. You should get better fuel economy during the summer because the air being drawn into the engine is hotter (therefore less dense). It's the same concept as people that run an open cone in the engine bay as a HAI to increase fuel economy.

Hell, before I put my wheels on I could manage almost 34 MPG during the summer on my drive from Nashville to Chicago whereas during the winter I was lucky to hit 30.


Yea thats the impression i was under. The hotter it is out the better MPG i should be getting.

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PostPosted: Wed Jul 13, 2011 6:36 pm    Post subject:   Reply with quote

amoffitt wrote:
IffyG wrote:
amoffitt wrote:
I told him that i was losing a few MPG as of the last few months and he told me it was due to the heat. (I live in TX and currently its about 100 or so outside). That's when he told me to run mid grade gas to improve MPG.


This guy was talking out of his ass. You should get better fuel economy during the summer because the air being drawn into the engine is hotter (therefore less dense). It's the same concept as people that run an open cone in the engine bay as a HAI to increase fuel economy.

Hell, before I put my wheels on I could manage almost 34 MPG during the summer on my drive from Nashville to Chicago whereas during the winter I was lucky to hit 30.


Yea thats the impression i was under. The hotter it is out the better MPG i should be getting.


You two having fun talking out your ass? Laughing You realize that there's a lot more that factors into fuel efficiency than air density in relation to temperature, but the concept that less dense air = better burn efficiency is just wrong. If that were the case, turbocharging wouldn't be an efficiency saving design. Rolling Eyes

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PostPosted: Wed Jul 13, 2011 6:43 pm    Post subject:   Reply with quote

I'll agree that there are far more variables than air temperature, but to say that 100* heat is the reason he is seeing lower fuel economy is absurd. It's even more absurd that they guy jumped to running midgrade fuel to fix that.

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amoffitt
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PostPosted: Wed Jul 13, 2011 6:45 pm    Post subject:   Reply with quote

BTW he also said that for my MPG to be down by about 3 mpg that my alignment would have to be pretty bad. I dont know his defintion of bad but is there any truth to that one?

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PostPosted: Wed Jul 13, 2011 11:04 pm    Post subject:   Reply with quote

Try Jet A instead of Jet A-1. A has a higher freezing point and will probably give you better mileage.

On a serious note, how does e10 & e85 effect performance?

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PostPosted: Thu Jul 14, 2011 11:46 am    Post subject:   Reply with quote

BlackVenom wrote:
On a serious note, how does e10 & e85 effect performance?

It basically has the octane rating of about 100. Some people who have proper tuning equipment can add a few gallons of E85 to their fuel tank and affectively add a few octane points. In tern, you can get more aggressive with your timing. But again, this means you need a proper tuner to monitor all aspects of your fuel trims.

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amoffitt
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PostPosted: Thu Jul 14, 2011 12:55 pm    Post subject:   Reply with quote

Quick question... I went and dropped off my car at the shop for alignment and they said they couldnt get it true. They said that i needed to replace tie rod and the bearings before they could do it... Are they still feeding my BS or could they have done it without having those things replaced?

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