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Premium Gas - Does the Brand of gas make a big difference in acceleration? - Page 5
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Thread: Premium Gas - Does the Brand of gas make a big difference in acceleration?

  1. #41
    Senior Member bryanintowson's Avatar
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    most states have their own laws requiring ethanol blends. In Maryland where I live, it's kind of a crapshoot because we have different zones of the state with different smog laws. Overall tho, you can count on getting 10% ethanol when you fill up in MD.

    Personally, I always fill up Dante with 93 Octane from BP.

  2. #42
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    Hope this might help those looking for ethanol free fuel ...

    http://pure-gas.org/index.jsp

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    We usually run 87 octane. I stopped getting gas from where I usually do because I noticed three of our vehicles, including the Fiat, spark knocking on acceleration/up hills. Started using a different brand/station and it went away. So now I avoid the place. I have run 91, highest around here, a couple times. I too noticed a bit of power according to the seat of the pants dyno and a slight increase in MPG's.

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    Quote Originally Posted by 4carbcorvair View Post
    . I have run 91, highest around here, a couple times. I too noticed a bit of power according to the seat of the pants dyno and a slight increase in MPG's.
    Same story here from Reg to mid grade. Have not seen much change from mid grade to prem though. Generally run mid grade.

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    Senior Member Rocco Reviews...'s Avatar
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    Quote Originally Posted by Nero View Post
    I switched from 87 octane to 93 octane and felt a noticeable difference in my 500's performance as well as 3-4 more miles per gallon. Well worth the additional 3 bucks per tank. Best results with Chevron brand.
    It's smiles per gallon.

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    Quote Originally Posted by rtwolfe View Post
    That BP gas seemed to have made a big difference. The car quickly responded and with some torque, when I stomped on the gas. So question, if you too are looking for the best performance (aka Speed), have you found that that 'Brand' of premium gas makes a significant difference? If so, which brand works the best for you?
    Answer: No. Placebo effect.

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  8. #47
    Moderator map's Avatar
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    +1 on Placebo, but if placebo makes you smile...

    For models where mfgrs recommend premium, they say there "may" be a small increase in performance and MPG, but some owners don't notice a difference. I'd guess it's down to how WOT you drive, how often you get into high turbo boost. Pure gas (no ethanol) has more energy per gallon, but is 30% more expensive. Running Premium, MPG improvement is almost always less than the added cost.

    Ethanol-free is all we put in our vehicles that are stored a lot. It still "goes bad" but will usually start easily after 6 to 9 months. I stopped using Shell in the early 70's because my 60's VWs didn't like it. Last year I picked up some bad (old?) fuel from a Chevron. 2 tanks of ethanol free Shell cleared the system again. Maybe any would have, but Shell runs higher amounts of cleaner in their fuel... and that station is the only local place to buy non-ethanol.

  9. #48
    Senior Member smark's Avatar
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    We use Phillips 66 91 0ctane, here in the Midwest. Really haven’t notice any Performance difference between 87-91. Might get a little better fuel economy with the 91, but it cost more.
    Last edited by smark; 07-01-2020 at 05:58 PM.

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