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  1. #41
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    Aug 2015
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    Spokane, WA
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    Quote Originally Posted by jason1973 View Post
    All pump gas is required to have detergent. I am not sure where you got this from. At least in the midwest. They ALL have detergent packages. Its required.
    That is not true. There is no regulation requiring any detergents or additives in gasoline! Check you facts!


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  2. #42
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    Aug 2015
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    Spokane, WA
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    Quote Originally Posted by MLA View Post
    The EPA does mandate a basic additives package for every gallon of road fuel that goes into the pipelines. The more name brand gas companies do add some proprietary additives to the gas once they draw it from the pipeline though. IMO, this is manly marketing.

    I fuel up at where ever the gas is the cheapest. My 17 year old SUV with 280K averaged 16+ MPG from new up to the day it died. Zero fuel problems.
    And your study population is 1. Glad physicians donít use those sample sizes when studying medications, surgical techniques and treatment protocols!


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  3. #43
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    Aug 2015
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    Spokane, WA
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    Quote Originally Posted by sandm View Post
    edo- texas may be different due to the location to refineries but out west in Boise, there was only 1 main pipeline into the valley and all but 1 of the major brands buys from the same source out of salt lake city(iirc flying J travel center buys from a different refinery in slc and trucks it up). each manufacturer then adds their own special mixture to make it unique. chevron could get the "bottom of the barrel" and then add from there. stations are selling the same basic gas and adding what they want to it but in the end costco, walmart, chevron, insert any name here- are all coming from the same holding tanks.
    I would be surprised if it's much different around other parts of the US. with razor-thin margins buying in bulk from wherever and adding your own additives makes business sense.

    https://www.idahostatesman.com/news/...e40864992.html

    not sure about requirements in the midwest with detergent being required but would not surprise me. gasoline in green bay was price controlled in that you could not sell below cost so everyone sold for the same amount. no reason to not add it as margins were the same for everyone.
    So you now know why Maverick gas is less expensive.


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  4. #44
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    Aug 2015
    Location
    Spokane, WA
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    Quote Originally Posted by Edo88 View Post



    Iím just saying there is a big difference between top tier fuel and regular thereís nothing wrong with running cheap fuel on a motor that uses good ol sequential or TB injection. But for motors with direct injection I would only run a top tier brand even if it is 87 octane seen plenty of motors carbon up with 30 40k miles. Vw actually made us add a fuel additive that would help break the carbon down if it had cold start misfires. Lexus was replacing pistons. Since carbon is a by product of combustion and with direct injection you donít have the injector cleaning the valve a good detergent is a must

    We had a diesel that got bad fuel at shell and blew up the injection pump and sent metal through the entire system shell cut a check for 10k for the repairs also another reason Iíll only get fuel at a reputable place.


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    Even standard fuel injector performance will decrease with regular use of non-detergent gasoline. Running every other tank probably wonít cause an issue.

    I guess folks just need to ask themselves if saving a nickel per gallon ($2 per 40gallons) is worth it. It reminds me of my wife who use to drive all the way across town to save a couple cents per gallon. It made sense in her mind until I showed her the math.


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  5. #45
    Join Date
    Apr 2018
    Location
    Texas
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    241

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    Quote Originally Posted by Jeepers View Post
    Even standard fuel injector performance will decrease with regular use of non-detergent gasoline. Running every other tank probably wonít cause an issue.

    I guess folks just need to ask themselves if saving a nickel per gallon ($2 per 40gallons) is worth it. It reminds me of my wife who use to drive all the way across town to save a couple cents per gallon. It made sense in her mind until I showed her the math.


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    Iím pro detergents wonít run anything but a top tier fuel supplier. Iíve torn plenty of motors down and seen the difference between Kroger fuel and shell. That being said all my vehicles are diesel lol. Just the boat is gas powered but it only gets top tier

    Side note though surprised no one has mentioned the crankcase recirculation system and how much cleaner a engine would be if one was to bypass it and install a catch can system


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  6. #46
    Join Date
    May 2018
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    Quote Originally Posted by Jeepers View Post

    You can only take advantage of the higher octane if you increase the engineís compression. Tuning wonít do jack crap and anyone who says otherwise you should ignore. They have no fricken clue what theyíre talking about.

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    So how come I can put a stock truck
    running 87 octane from the factory on a dyno......say a GM 5.3L and increase the timing and fuel tables with 93 octane and make more horsepower?

    How did GM in 2014+ have the 5.3L make 355hp 383 ft lbs on 87, but when running 105 octane E85 it makes 380hp and 417 ft.lbs knowing GM increase the timing tables when the alcohol sensor reads 85% alcohol?


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  7. #47
    Join Date
    Oct 2010
    Location
    Lake Wylie NC Area
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    2,096

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    Quote Originally Posted by Jeepers View Post
    And your study population is 1. Glad physicians don’t use those sample sizes when studying medications, surgical techniques and treatment protocols!


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    LOL, its all good. My vehicle is just one small sample of my experience over a 30+ year career in the automotive repair/instruction and boat industry.

  8. #48
    Join Date
    May 2018
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    I just rolled 250k miles on all original drivetrain on a 2002 Sierra 4x4 5.3l, runs great, reliable and consumes nearly zero oil.

    I just changed the oil for the 10th time.......I will let that sink in for a moment.

    Amsoil since day 1.


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    Michigan

  9. #49
    Join Date
    Jun 2008
    Location
    Henderson, NV
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    5,298

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    Quote Originally Posted by Jeepers View Post
    You can only take advantage of the higher octane if you increase the engineís compression. Tuning wonít do jack crap and anyone who says otherwise you should ignore. They have no fricken clue what theyíre talking about.
    tuning is one of the best ways to get more poop out of a motor without changing the octane or compression requirements.
    the raptor 400 and 440 motors are identical. only difference is software. where is the extra hp/tq coming from the 440?
    personal experience. in 2006 I drove my evo9 to oregon. car was filled with 91octane premium(recommended by mitsu). a guy named Jestr flew from Florida for a tuning session. strapped the evo to the dyno. base pull was 302hp/297tq. only opened the hood to cool the engine-no parts added and nothing mechanical changed. no changes to fuel or additives. 7 pulls and 30 minutes later. dyno reads 363hp/362tq. where did the extra 60hp/tq come from with no changes in octane or compression.
    take a car tuned on 87, feed it 93, change nothing else and if you messed with the tune you will get more hp/tq out of it. messing with the timing and fuel delivery will net more power.

    Quote Originally Posted by Jeepers View Post
    Even though the gas station sign says: Chevron, Conoco, Texaco... the non-ethanol fuel the station is selling is not from that brand. They buy the non-ethanol from tiny local fuel distributors and there are no detergents.
    read this article and see that in Boise's case ALL fuel is coming from the same source whether it's ethanol/non-ethanol/top tier/discount. additives are added later. the couple stations that sold both mid grade ethanol and mid grade non-ethanol are getting them out of the same bulk tank of fuel.
    interesting that I would bet a lunch spokane is operating the same way as some of your gas is coming through the same pipe from boise and some from billings thru a similar pipe/delivery system. betting money just like boise the additives/ethanol are put in once in the area.
    https://www.idahostatesman.com/news/...e40864992.html .


    Quote Originally Posted by Edo88 View Post
    Side note though surprised no one has mentioned the crankcase recirculation system and how much cleaner a engine would be if one was to bypass it and install a catch can system
    had one in the evos. just don't let the emissions testing stations catch you primary goal was keeping the oil out of the intake tract. iirc I dumped a small amount each month. probably a 1/4qt each oil change.
    '06 Supra Launch 20SSV-gone but never forgotten

  10. #50
    Join Date
    May 2018
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    1,211

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    GM engines LS and LT should run a catch can, especially on a supercharged variant like the LSA, LS9, LT4 and LT5. The PCV systems are a little goofy.

    I understand guys who are wrench savy, but regular joe would struggle with understanding the catch can maintenance.

    I run one on my LSA and it keeps the intake tract clean.


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    Michigan

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