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Thread: different fuel makin huge fuel economy difference?

  1. #1
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    different fuel makin huge fuel economy difference?

    Here's one for you guys. I generally run bp or shell premium fuel in my cars. If i can afford it I run Sunoco 93 octane. Its generally 10-15 cents more then premium per gallon. My old 06 mustang ran way better with it then anything else so I figured id try it in the marauder. Just got 115 miles out of my first 1/4 tank and normally I get about 80-85. Any thoughts?

  2. #2
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    Quote Originally Posted by montyd View Post
    Here's one for you guys. I generally run bp or shell premium fuel in my cars. If i can afford it I run Sunoco 93 octane. Its generally 10-15 cents more then premium per gallon. My old 06 mustang ran way better with it then anything else so I figured id try it in the marauder. Just got 115 miles out of my first 1/4 tank and normally I get about 80-85. Any thoughts?
    Pay attention to Ethanol content. It affects mpg more than octane. Running non-ethanol gives me 5mpg more than running fuel with the 10% ethanol added.

    WLB
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  3. #3
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    Quote Originally Posted by MyBlackBeasts View Post
    Pay attention to Ethanol content. It affects mpg more than octane. Running non-ethanol gives me 5mpg more than running fuel with the 10% ethanol added.
    Same here (I see about a 2 -3 mpg gain), but with the price subsidies on ethanol-added gas, the increased mileage gained still doesn't offset the difference in price, so I normally run the 10% added stuff...

    FWIW, I get my best mileage from Shell V-Power, Sunoco doesn't do much for my car, but each one is different.

    2003 300B DBP
    Build date: 6/19/03
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  4. #4
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    Quote Originally Posted by SC Cheesehead View Post
    Same here (I see about a 2 -3 mpg gain), but with the price subsidies on ethanol-added gas, the increased mileage gained still doesn't offset the difference in price, so I normally run the 10% added stuff...

    FWIW, I get my best mileage from Shell V-Power, Sunoco doesn't do much for my car, but each one is different.

    No doubt the shell v-power 91 is different here than other places but they say the 91 has no ethanol. They are required to add 5% to their fuels but apparently add more than the 5% to their regular so they don't have to add any to their 91. Some of their pumps say no ethanol on their 91.

    Anyone else see this?

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  5. #5
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    gas

    I can't find any gas here in Myrtle Beach that does not have 10% ethanol...I like Sunoco 93 the best..I pulled into a Sunoco in Spartenberg and no 93,only 92..

  6. #6
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    No doubt the shell v-power 91 is different here than other places but they say the 91 has no ethanol. They are required to add 5% to their fuels but apparently add more than the 5% to their regular so they don't have to add any to their 91. Some of their pumps say no ethanol on their 91.(kernie)



    If Y'all can "buddyup" to the managers at the stations in question,the ethanol content(%) and additives are listed on their "Drop" ticket at the point of delivery.
    This will put any "what ifs" away....
    My wife sells 8-10K a day thru a branded Chevron station...Pumps say "UP TO" but actual is 2%...(In Jefferson Co,AL--Birmingham area)

  7. #7
    Click here to find ethanol-free gas stations
    http://pure-gas.org/

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  8. #8
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    what about the news lately about bad gas from BP......was mentioned again on the news last night.......I was unfortunate enough to get some a while ago.....idled rough....hesitated upon acceleration.....only good thing about it was I only got $30 worth and at these prices you don't get much....the great state of Illinois was on the news this morning....highest gas prices in the 50 states....even higher than Hawaii where it's shipped in....WTF...plus the extra added benefit of the "summer blend"....more crap.....

  9. #9
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    i notice only a negligible difference in fuel economy when running 10% ethanol. there are only a few stations on OKC with 100% gasoline and only 1 station with 93 octane
    '03 Marauder - 4.10's, Lidio tune, JLT intake - 14.8 @ 95.8
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    '93 Mustang LX 2.3L coupe - soon to be recipient of the GT's suspension and drivetrain

  10. #10
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    I don't seem to notice much difference, but perhaps it's due to my tune being done on the 10% crap. Also, up here in the People's Republic portion of the nation, pure gasoline is outlawed. Worse yet, they're supposed to be going to 15% soon. In the '55 Ford, my boats, and all my small engine toys/tools, I use the blue enzyme to counter any ethanol issues. I know the 10% stuff played havoc with my 88 special Johnson's seals and hoses. A pricey lesson indeed.
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  11. #11
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    Quote Originally Posted by SC Cheesehead View Post
    Same here (I see about a 2 -3 mpg gain), but with the price subsidies on ethanol-added gas, the increased mileage gained still doesn't offset the difference in price, so I normally run the 10% added stuff...
    15 gallons with extra 5mpg =
    15 x 5 = 75 extra miles driven on the 15gal
    75/20mpg avg = 3.75 gallons of gas saved
    3.75 x $4gal = $15.00 saved by running non-ethanol premium

    Cost here is $0.30 per gal higher for NEP vs. reg w/ethanol
    15gal x .3 = $4.50 extra cost

    Spend $4.50 to save $15, I値l take that all day long. Plus the car has significant more throttle response, pep and drivability enjoyment. Win Win Win!

    Same math at 3mpg saved = Spend $4.50 to save $9, I値l take that all day long. Plus the car has significant more throttle response, pep and drivability enjoyment. Win Win Win!

    Same math at 2mpg saved = Spend $4.50 to save $6, I値l take that all day long. Plus the car has significant more throttle response, pep and drivability enjoyment. Win Win Win!

    Same math at 1mpg saved = Spend $4.50 to save $3 = $1.50 loss BUT - I値l take that all day long! Spend $1.50 for more significant more throttle response, pep and drivability enjoyment. Win Win Win!

    WLB
    BB#1) 1996 ImpalaSS - 16,500 miles - 100% stock
    ______________________________ ___________

    BB#2) 2003 Marauder (300a) - 34k miles - Daily Driver
    #2912 of 7093
    Conceived 8/6/2002
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    Trilogy 242 - Self Installed 9/9/12 (0-60 5.5 sec)
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    ______________________________ ________________

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  12. #12
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    Quote Originally Posted by Paul T. Casey View Post
    I don't seem to notice much difference, but perhaps it's due to my tune being done on the 10% crap. Also, up here in the People's Republic portion of the nation, pure gasoline is outlawed. Worse yet, they're supposed to be going to 15% soon. In the '55 Ford, my boats, and all my small engine toys/tools, I use the blue enzyme to counter any ethanol issues. I know the 10% stuff played havoc with my 88 special Johnson's seals and hoses. A pricey lesson indeed.
    Hopefully we can get that corrupt mandate ended before the 15% bs starts.

    WLB
    BB#1) 1996 ImpalaSS - 16,500 miles - 100% stock
    ______________________________ ___________

    BB#2) 2003 Marauder (300a) - 34k miles - Daily Driver
    #2912 of 7093
    Conceived 8/6/2002
    Delivered 9/19/2002
    Adopted 8/10/2011
    Trilogy 242 - Self Installed 9/9/12 (0-60 5.5 sec)
    Pioneer 6x8 Front
    Legacy 600w 6x9 Rears
    JL 6.5 SubWoofer
    K&N CAI
    Window tint 50% rear/35% front
    FBM CHMSL with Strobe mod 7/1/12
    DR Deep Aluminum Trans Pan
    Sparta FOMOCO Racing 8.8 Girdle
    Mo's Dyno Tune
    Gorilla Nuts - The System
    Ford Racing 4.10s, 31 spline Cobra carrier & axles 7/1/12
    Powder Coat Axle Housing 7/1/12
    CME HP Rear Control Arms & Watts Link 7/1/12
    ______________________________ ________________

    Rex "SC Cheesehead" Weinbender 11-14-13
    Ed "Baaad GN" Linthicum 8-6-2014

  13. #13
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    The Gas mileage in my Marauder has recently dropped from 19.2 MPG to 17.3 MPG. That is roughly a 10% drop. I could not figger out why.
    If my gas station has switched to the 10% ethanol - that could explain the difference.
    Gas here is $4.399 for 91 octane. 10% is $0.44 a gallon.
    Big difference. I am going to try a gas station with no ethanol.
    Jim
    PS I have been recording the gas mileage/cost on an excel spreadsheet since 2005.

  14. #14
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    There is a place near me that sells "premium" 91 octane with no ethanol, or I can buy 93 with 10% in it.

    Which do you guys think is better?
    2021 F150 XLT Super Crew short bed - no chrome! - 3.5 Ecoboost 400hp/500tq - 36 Gal tank (600 miles) - 4x4 FX4 Offroad + Max Tow - 3.55 Locker - 10 Speed - Pro Power 2kva - 24mpg @ 80 Ford is still the best.
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  15. #15
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    Quote Originally Posted by MyBlackBeasts View Post
    15 gallons with extra 5mpg =
    15 x 5 = 75 extra miles driven on the 15gal
    75/20mpg avg = 3.75 gallons of gas saved
    3.75 x $4gal = $15.00 saved by running non-ethanol premium

    Cost here is $0.30 per gal higher for NEP vs. reg w/ethanol
    15gal x .3 = $4.50 extra cost

    Spend $4.50 to save $15, I値l take that all day long. Plus the car has significant more throttle response, pep and drivability enjoyment. Win Win Win!

    Same math at 3mpg saved = Spend $4.50 to save $9, I値l take that all day long. Plus the car has significant more throttle response, pep and drivability enjoyment. Win Win Win!

    Same math at 2mpg saved = Spend $4.50 to save $6, I値l take that all day long. Plus the car has significant more throttle response, pep and drivability enjoyment. Win Win Win!

    Same math at 1mpg saved = Spend $4.50 to save $3 = $1.50 loss BUT - I値l take that all day long! Spend $1.50 for more significant more throttle response, pep and drivability enjoyment. Win Win Win!
    Cost differential (at least here) is about $0.40/gal between the 10% and pure stuff.

    I also double checked my mileage data, and was quoting the wife's hybrid Escape; my car's only about 1.5 mpg difference, so I'm just going with the corn for now...

    2003 300B DBP
    Build date: 6/19/03
    Number 7,792 of 7,838 - 326 of 328
    Proud member of the MM "BLUES" Bros.
    Purchased: 11/10/05
    Eaton swap by ImpalaSlayer 11-09-10

    Semper et in Aeternum, Mercurius.

    In Memory:
    2004 DTR
    Build Date 01/27/04
    Purchased 04/04/04
    Wrecked 10/19/05, R.I.P.



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