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  #46  
Old 10-14-2010, 12:29 PM
afogle2 afogle2 is offline
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Default Re: Gas! Does it matter?

I might be a little late on this thread but I found it very interesting.
I use Shell about 80% of the time. For some reason I've love shell gas, I think my truck runs better with shell. Around my oil changes I usually run higher octane. I don't know if this makes a difference but in my mind it seems to help.
My girlfriends parents just bought a new Toyota 4Runner and we had it out a while back and had to fill it up. He dad runs mid grade in it because that's what Toyota recomends. For some reason she thought her parents used premium so she filled it up with V-Power. Her parents usually fuel up at Chevron. When we got the car back to her parents her mom commented on how much better it was running and asked if we did anything different. She was amazed how much better it was.
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  #47  
Old 10-15-2010, 06:07 AM
sgtsandman sgtsandman is offline
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Default Re: Gas! Does it matter?

Generally, a higher octane fuel will make no difference in vehicle performance or fuel mileage but that is not a hard set rule. Some times it does make a difference depending on the vehicle.

As long as you get a major name brand and go with what the manufacturer suggests for octane rating, you will be fine.

I must admit that I've had to bump mine up from 87 to 89 on my truck because of valve knock though. I'm thinking of doing a sea foam treatment through the brake vacuum hose to see if that might help things.
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  #48  
Old 03-10-2011, 07:03 PM
Rango88 Rango88 is offline
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Default Re: Gas! Does it matter?

Has anyone noticed a difference in terms of performance vs using regular gas vs premium, especially in the SOHC 4l?

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I know that the 4L requires 87 octane, just wondering if people have tried higher levels and seen a difference
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  #49  
Old 03-10-2011, 08:06 PM
mickblock mickblock is offline
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Default Re: Gas! Does it matter?

I'd put in premium once in a while when I misguidedly thought that it would act as an engine cleaner. Until I read a post on this very thread that gave me reason to doubt that there is any difference beyond octane rating.
But I never noticed any tangible difference above the horsepower gain I get after a thorough wash and wax. Our engines are made for 87. So the ECM will merely "adapt" to anything else.
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  #50  
Old 03-10-2011, 08:20 PM
01motomike 01motomike is offline
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Default Re: Gas! Does it matter?

I have noticed mpgs and running better its just to dame much lol
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  #51  
Old 03-10-2011, 08:24 PM
HazardousRanger HazardousRanger is offline
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Default Re: Gas! Does it matter?

ive ALWAYS USED CHEVRON...i will risk running out of gas to find a chevron....in my whole driving career i have only filled up twice with a non chevron gas......

helps that i have a chevron credit card
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  #52  
Old 03-10-2011, 08:29 PM
sgtsandman sgtsandman is offline
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Default Re: Gas! Does it matter?

As a general rule, all premium gasoline does in an engine designed to run on 87 octane is empty you wallet faster. Some have noticed on various vehicles that their mileage will go up a gallon or two with 89 or some other higher octane fuel but the cost for the fuel either balances out or ends up being more than just running with 87.
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  #53  
Old 03-10-2011, 08:51 PM
Twisty Twisty is offline
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Default Re: Gas! Does it matter?

Gas - it can matter.
After I bought my truck new, I took it in for a service/checkup. I told the service gal that it idled rough and the idle RPM's varied. She asked me where I bought gas. I said at the station just down the street (an AM/PM I think?). She said buy good gas.
I've put nothing but Chevron in it since then.
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  #54  
Old 03-10-2011, 08:54 PM
FireRanger FireRanger is offline
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Default Re: Gas! Does it matter?

Quote:
Originally Posted by Crowd88 View Post
Has anyone noticed a difference in terms of performance vs using regular gas vs premium, especially in the SOHC 4l?

----------

I know that the 4L requires 87 octane, just wondering if people have tried higher levels and seen a difference
The engine is designed for 87. Putting in higher octane will cause it to not run properly. Generally causing, if anything, a decrease in mpg, decrease in performance, increase in carbon buildup, and decrease in your net-worth. Don't bother. It is only appropriate in high compression engine designed to make use of it.
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  #55  
Old 03-10-2011, 08:56 PM
Rango88 Rango88 is offline
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Default Re: Gas! Does it matter?

Quote:
Originally Posted by FireRanger View Post
The engine is designed for 87. Putting in higher octane will cause it to not run properly. Generally causing, if anything, a decrease in mpg, decrease in performance, increase in carbon buildup, and decrease in your net-worth. Don't bother. It is only appropriate in high compression engine designed to make use of it.
Thanks for the tips guys
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  #56  
Old 03-10-2011, 09:13 PM
ColinS ColinS is offline
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Default Re: Gas! Does it matter?

i use marathon reg 87 octane. seems to work fine for me i get about 300 per 3/4 of a tank
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  #57  
Old 03-10-2011, 09:44 PM
SB03Ranger SB03Ranger is offline
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Default Re: Gas! Does it matter?

I usualy use the 2 stations in town that dont sell there gas with "ethonal" in it. chevron, andour co-op. truck runs way better and i get better gas MPG's with it. i hate ethonal. i can feel the differnce in my truck. but thats just me. usaly 300 on a tank in city on non ethonal gas and only 250 with ethonal. thats my experince.
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  #58  
Old 03-11-2011, 06:28 PM
JGiddy JGiddy is offline
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Default Re: Gas! Does it matter?

Does anyone have experience with Valero gas? Ive been going there more lately because gas prices are going up. They're cheaper than Chevron/Shell/76/Mobil but not as cheap as Arco (crap) gas. Valero is cool because they don't import from the middle east but I'm unsure of the quality of their gas vs Chev/Shell/76/Mobil or if their gas has the supposed stuff in it that keeps injectors from gumming up (Ive heard that Chevron and Shell are the only 2 that have it)

Last edited by JGiddy; 03-11-2011 at 06:33 PM.
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  #59  
Old 03-13-2011, 08:28 PM
OhioMike OhioMike is offline
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Default Re: Gas! Does it matter?

Quote:
Does anyone have experience with Valero gas? Ive been going there more lately because gas prices are going up. They're cheaper than Chevron/Shell/76/Mobil but not as cheap as Arco (crap) gas. Valero is cool because they don't import from the middle east but I'm unsure of the quality of their gas vs Chev/Shell/76/Mobil or if their gas has the supposed stuff in it that keeps injectors from gumming up (Ive heard that Chevron and Shell are the only 2 that have it)
A lot of great info. has been posted here, and I have a couple insights I would like to share. I have noticed that my Ranger runs better with Shell. I swear by it. Yet, my wife's 3.5 liter V6 Ford Edge, I can put almost anything in it - Shell, BP, Speedway, etc. Yet, Ford recommends BP. Also, 87 Octane in NE Ohio at Shell/BP whatever is not the same as 87 Octane in Florida/MI/PA, etc. due to varying EPA requirements in different states. OH used to allow 3 - 5% Ethanol, but that level has been raised to 10%.
Here, Citgo stations got rebranded Valero (about 5 years ago). I went to Valero once, and my truck ran like crap. A friend worked for an auto shop that said, "Stay away from Marathon (parent co. of Speedway/SuperAmerica) since the gas apparently causes fuel filter/oxygen sensor issues with friends". I can relate to this personally. My mom previously owned a 93 Taurus, my wife a 96 Ford Contour, and myself a 97' Ranger. All three of us used SW primarily and had oygen sensor and fuel filter issues. My wife's fuel filter was so clogged, a particular shop tech. said, "We have never seen a car with unleaded gasoline have a filter so bad. It looks like you were running leaded gasoline". To Marathon's benefit, they used to be the only brand that tended to have a higher ethanol content, yet I have never had a problem with other stations. Out of habit, I stay away from the cheaper places.
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  #60  
Old 03-13-2011, 08:45 PM
tcmills3 tcmills3 is offline
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Default Re: Gas! Does it matter?

i get .5 to 1 mpg better without using e10. i go with regualr
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