What grade gas do you all use?

Discussion in 'Generation 4 - General Discusson' started by Mjdange, Jul 7, 2019.

  1. Mjdange

    Mjdange Member

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    I recently got into a very delightful conversation with a fellow SHO owner that said he only uses Regular gas. I like to use Premium gas in my SHO because....well....race car.

    Any opinions or long winded answers are welcome.
     
  2. STAN SCHWARTZ

    STAN SCHWARTZ SHO Member

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    Premium here. But not only for the performance aspect but also (as I understand it), there are more detergents/cleaners, in the premium fuels.


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  3. krewat

    krewat SHO Member

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    93 only - I tried 87 once. ONCE in my 2013 - the loss of power was horrible (to me). It wasn't tuned.

    I would think for any one brand of gasoline, the actual detergents/cleaners are no different between octane levels. BP 87 would have the same level as BP 93, for example.

    I found that for my "normal" cars with the non-PI head 4.6L, and my F250 V10, 87 octane ran the best. 93 octane would make them feel "cold" like a carbureted engine that was just started. Off-idle throttle response suffered. And, I could use almost any brand of gasoline in them and there was hardly a difference.

    However, in this Ecoboost, it's pretty amazing the difference in gasoline brands. I find that Sunoco or BP seem to be the best. Might have something to do with direct injection.
     
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  4. SM105K

    SM105K Land Yacht Pilot Supporting Member

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    E30
     
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  5. EcoBoostSHO

    EcoBoostSHO SHO Member

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    BP 93 with an occasional splash of E85. I always keep it under E15 per my tuner.

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  6. Johnbigdog

    Johnbigdog SHO Member

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    Reading the owners manual and what Ford published about our cars, the H.P. and torque numbers have a note underneath that day they were obtained with 93 octane.

    The car can run on 87. It looks at the knock sensors and other inputs and adjusts timing to not hurt itself. There is a PID called OCT-ADJ that gives an indication of what quality/octane the fuel is. 1 would be bad, 100 would be the best.

    If you run good 93 the car will give everthing it can within its programming. If you run 87, it will run, but not to it's full potential.

    What I cant tell you is if there is any benefit to 90, 91, 92, 93 as the kicker is the pump always says MINIMUM octane average. So that 87 may be 87 becuase there is more volume sold. That 89 or 90 may have a higher octane so that as it degrades it doesnt fall below the advertised octane. However, I cant be sure because I have no way of testing octane myself.

    I've run BP 90+ in my car since I bought it new. Ive recently started running Sam's Club 93(?) Becuase its .5 cheaper. My OCT ADJ always have 100.

    I've been meaning to put a tank of 87 in and whatcha pids to see the difference, but out of habit I keep hitting that 93 button.
     
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  7. johnnyrauder

    johnnyrauder SHO Member

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    you get what you pay for.
     
  8. ridered74

    ridered74 SHO Member

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    E30ish, and before I discovered the magnificence of E30, 93 octane only for the last 4 years.

    If saving money on gas is what you are after, E30 will save you a few bucks each fillup.
     
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  9. Lostneye

    Lostneye SHO Member

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    Not necessarily. I do try and stick to "Top Tier" as it is a standard that the manufacture adheres to. I run 93 since I've had the SHO sometimes a gallon or 2 of e85.
     
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  10. STAN SCHWARTZ

    STAN SCHWARTZ SHO Member

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    Yeah well...it's just something I "heard" many years ago. However this thread made me actually check up on it. So... Not sure how enforced this is but... I'll just leave this here... :)

    www.toptiergas.com



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  11. Jeff2017

    Jeff2017 SHO Member

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    I run 93 octane. Buy at Costco.
     
  12. Totaled TL

    Totaled TL Member

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    Been using 87 since I've had mine, no ill effects that I know of. I don't hot rod much.
     
  13. 6500rpm

    6500rpm Quality Always Shoots Straight

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    My preference was Shell V-Power until Shell pulled out of my area. Lately I've been playing with Philips 66 (2gal) E85 then topped off with their 93 octane. Comes out to just a bit over 94 octane and 18%E which is a little high for my untuned SHO but it seems to like it. The Shell V-Power had a lot of positives going for it, and I'd have never switched if I had a choice.
     
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  14. SHOdded

    SHOdded SHO Member Supporting Member

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    Have you tried Exxon/Mobil w Synergy?
     
  15. STAN SCHWARTZ

    STAN SCHWARTZ SHO Member

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    That's what I use almost exclusively.


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  16. rubydist

    rubydist SHO Master Staff Member Super Moderators

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    irrespective of what brands claim to be "top tier", I can tell you there is a significant difference in the detergent / injector cleaner quality of the TOP brands like BP/Exxon/Mobil/Shell/Phillips 66/Conoco, and the other brands like Valero/Diamond Shamrock/Qwick/house brands. I cannot speak for Costco gas since its not at all convenient for me to go to Costco to get gas
     
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  17. SHOdded

    SHOdded SHO Member Supporting Member

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    I have found differences in Costco gas depending on location. Here in the Silver Spring area, fair to middling. Go about 10-20 miles north, it is a noticeable improvement. It pays to look around.

    And ditto on avoiding fuelups when the tanker is pumping into the underground tanks. Even at Costco. LOL.
    In my less than scientific testing, it is the gas that comes closest to Shell. Dare I say, Exxon 87 > Shell 87, but Shell 93 > Exxon 93.
     
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  18. Lostneye

    Lostneye SHO Member

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    Based anecdotally on just the one local Exxon/Mobil and BP station nearest me OAR is higher for me with BP. Still doesn't max out on straight 93 on GH AO tune which is why I will sometimes add some e85 to get there.
     
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  19. b4black

    b4black Member

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    Some brands like BP, Shell and Exxon Mobil put more detergents in their premium that regular. That doesn't matter much in a GDI engine.

    I ran E30 on a stock tune for a long time without issue. LFTF went up about 5-7 numbers which is spot on for 20% more ethanol (about 6% less energy). Zero knock.
     
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  20. shoflo

    shoflo New Member

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    Whats the reason for this?
     
  21. SM105K

    SM105K Land Yacht Pilot Supporting Member

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    Because it is stirring up sediments in the bottom of the underground tanks.
     
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