Brand of gas and MPG

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BigRed76

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I've been using Sunoco 93 and getting on average 11.8-12.1MPG mostly local driving. Switched this morning to Exxon 93 and we'll give it 2 fill-ups and see if I notice a difference.
 

soulsea

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Mmm, not sure why you believe the brand of gas will make any difference in mpg. :think:

Most gas stations within an area, regardless of brand, are serviced by the same pipelines and more often than not are served by the same distributor. Different companies do add additives but that is heavily regulated by the EPA so they basically all have the same additives marketed under different names.

My suspicion is that any fluctuation you might observe will be due to driving variance more than whose fuel you use.
 

THE YETI

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Mmm, not sure why you believe the brand of gas will make any difference in mpg. :think:

Most gas stations within an area, regardless of brand, are serviced by the same pipelines and more often than not are served by the same distributor. Different companies do add additives but that is heavily regulated by the EPA so they basically all have the same additives marketed under different names.

My suspicion is that any fluctuation you might observe will be due to driving variance more than whose fuel you use.

I used to think the same thing until Justin did the tune on our Burban and noted that the octane gas we were using from BP wasn't burning how it should be.
 

07Burb

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I get my gas from Quiktrip (use 89 or 91 octane in the Burb) and have always had good luck with it. Not sure what the actual brand of the gas is, though, as they obviously by from a supplier.
 

thirsty1258

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I watched a segment on tv that showed different stations have better quality thus giving you better mpg. Not sure how true bit Bp was one of there better and so was quick trip. I used to buy wawa gas in when I lived in nj and my cars would stall out so I do think it matters. If I can recall sunoco was the best.

sent from my thunderbolt
 

mike1944

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I use Chevron 91 when possible.

Recently averaged 18 on a 7000 mile trip from Cal to Florida and back. Almost all highway miles.
 

waxworkz

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I used to think the same thing until Justin did the tune on our Burban and noted that the octane gas we were using from BP wasn't burning how it should be.

X2!! i did my own test the other day. i drove till my "low fuel" light went on and put in $20 of arco(BP). i only got 52 miles out of it. as soon as my light went on again i put $20 of mobile, 75 miles out of it. same drive more or less as i did trips to my dads house over the week end to work on his house and for bqq. same people in car, similar weather. i do have a BB tune and use 89 octane as per my tune
 

08OLP

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I live in a small town not a hole lot of choices but i always stop at the busiest one i think the gas at these smaller gas station could sit in there tanks for months. When i go to the big city HAHA and fill up at a QT or shell i think it does run smother dont know about MPGS.
 

soulsea

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Okay ... as an example, here's what happens in the DC area: http://www.washingtonpost.com/local...-investigation/2011/05/13/AFUtrx5G_story.html

Basically one distributor for the entire area. Anti-trust and price fixing issues aside, pretty much all the gas stations around here get their gas from the same pipeline and distributor. This arrangement is the case more often than not in many parts of the states ... sometimes a couple of distributors will compete but there are almost never, as I understand it, 1 distributor for every 1 fuel brand name.

Now, you wanna tell me that you're seeing significant mpg variance between different fuel brands simply because they have a slightly different mix of heavily regulated additives, so be it ...

The only way to really know is by filling up, putting the truck on rollers, set the cruse at a constant speed, and see how much fuel of each brand was used over a constant time frame.

Seems like a lot of effort though. :)
 

waxworkz

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i live in so cal and we have refineries for each brand all over the place in the south bay. i used to work for exxon about 20+ years ago and i know we never filled a truck for say 76 or arco.
 

Bryansan

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I guess my Denali must hate me. I fill her up with the cheapest 87 I can find, which right now in socal is about $4.10 p/gl. I tank typically nets me 350-400 miles or so, and if I believe the DIC, it's about 12.6 mpg.
 

the 18th letter

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Theres a lot of factors to consider, such as are you actually getting 91 octane. Did the pump get calibrated and actually give you 10 gallons and not 9.5. In my area gas stations are sometimes shady.
 

jee123

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so when my truck was stock with a k and n drop n filter and a magnaflow muffler i was getting 19mpg...after 22's, mid grade bb tune i get 16.5mpg...also, when justin did my tune the octane count in my gas was 83, i got it from a shell...so now i usually get chevron or exxon midgrade petrol.
 

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