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"Regular Gasoline" Can it still be bought? Benefits?

Discussion in 'The Hokey Ass Message Board' started by Zumo, Nov 2, 2007.

  1. Zumo
    Joined: Aug 30, 2004
    Posts: 1,389


    I need some schooling on the pros and cons of "leaded gasoline" I used to fill my car with it when I was a teenager but don't remember sh!t about it. was it more benificial for v8s or just high polutin'?
    Joined: Jun 2, 2002
    Posts: 9,635

    Classified's Moderator

    I think the only thing it did was lube the valve seats to keep them from breaking down as they weren't hardened as they are now.

    If you find someone selling it I'd bet the EPA would like to know about it.

    Everytime I turn on the news I hear some shit about lead poisoning. I'm willing to bet that had something to do with it's demise.

  3. Von Rigg Fink
    Joined: Jun 11, 2007
    Posts: 13,426

    Von Rigg Fink
    from Garage

    all small engine aircraft still use leadded fuel, and it is high octane, and it is expensive. it is nice for the old engines that have not have had their valves , and guides changed over for use in no lead fuel.
    the lead "lubrecated" the valve stems.
  4. Von Rigg Fink
    Joined: Jun 11, 2007
    Posts: 13,426

    Von Rigg Fink
    from Garage

    oops i ment valve seats..too early not enough coffee

  5. Rand Man
    Joined: Aug 23, 2004
    Posts: 3,591

    Rand Man

    Has 76 stopped selling their 100 oct . regular?
  6. Zumo
    Joined: Aug 30, 2004
    Posts: 1,389


    Thanks guys. I forgot all about the valves.
  7. Bigcheese327
    Joined: Sep 16, 2001
    Posts: 6,691


    Tetraethyl lead was also an anti-knock agent. Most modern gasoline uses ethanol (about 10%, adjusted seasonally) for the same purpose.

    I have never heard a first hand story of valves beating out their seats or seizing because of someone running unleaded in an early car - one old timer only told me it was a danger if you were towing or perhaps racing.

    I have also heard that some early postwar Ford V8's used hardened valve seats from the factory - I don't know why. Maybe a holdover from military spec?

  8. Fossil
    Joined: Jan 9, 2006
    Posts: 357


    It IS expensive when compared to regular unleaded at the pump, but it's a bargain when compared to race gas or even Cam 2. There's a small airport right near me that has a self-serve pump for Av-gas. It's 100 octane low lead, and I buy it there and use it for my race car. Small block Chevy with about 12.5:1 compression. It runs fine on that gas and I'm getting away cheaper than what they sell at the track. A little overkill for a streetcar though, unless you have really high compression.


  9. squirrel
    Joined: Sep 23, 2004
    Posts: 47,935


    My brother's 58 chevy wagon sunk several exhaust valves in the early 90s....I got to fix now you have that first hand story.
  10. pasadenahotrod
    Joined: Feb 13, 2007
    Posts: 11,776

    from Texas

    Amoco never made leaded gas. That was one of their big sales promotions from day one. All unleaded fuel for automobiles and trucks had additives for valve seat lubrication and other magic stuff. The higher cost of unleaded gas was always a profit-driven idea sparked by the greenfreaks rather than a manufacturing one.
    Mr. Fields was correct when he said, "Never give a sucker an even break, (then the part no one remembers but is most important) or smarten up a chump."
  11. 1BADSLED
    Joined: Jul 27, 2005
    Posts: 224


    Amocos premium was never leaded the regular was. From what I was told by my old boss who owned many "American" and "Standard " gas stations from the 30's through the 90's. It was the only gas that was able to used in Gasoline lanterns. I don't know if they still have the secret valve protector in the formula. It's still the only premium I use and I have never had a valve problem in my leaded fuel cars. Also have never had an injector problem in any of the newer stuff. Usually go about 200,000 miles on my cars before I replace the car. They still run like new, no injector service yet 4th injected car I have owned.
  12. RopeSeals???
    Joined: Jul 2, 2007
    Posts: 444


    Yup, fuel is one of the biggest costs now in flying!
    I remember when Avgas was $1.50 a gallon...
    It's $6.71 a gallon today @ LAS

    There is a low octane Avgas as well

    80/87 Avgas has 0.5 gr lead/gal

    100LL (Low Lead) Avgas has 2.0 gr lead/gal

    The cons of lead besides the cost and environmental issues, are deposits in the combustion chamber/spark plugs, especially in low compression engines... It also leaves grey gooey gunk in the crankcase, crankshaft, constant speed propellors, and governors... Lead sucks from a maintenance stand point, but it works...

    Good rule of thumb is to use the minimum octane required for your engine/operations... Here's the octane numbers from 1940
    premium, 77; regular, 70; and less-than-regular, 50 :eek: Food for thought!!!

    In my '39, I use Marvel Mystery Oil to lower the octane of 87UL and lubricate the valve stems/guides...

    100LL in the '39 with 6to1 compression ran like crap...
    I had drained my Cessna's tanks to replace a fuel line and shut off valve... It was paid for and I couldn't let it go to waste :D
  13. aabbcco
    Joined: Nov 25, 2006
    Posts: 88

    from Washington

    Sorry, Kinda OT, but has anyone ever used one of those Old Oilers - Like the marvel mystery ones or the Judson ones - plumbed into the intake manifold and run off of vacume. I've read that it helps lubricate the topend/valves, etc. - eliminating sunken valves and lengthening the time betwen valve adjustments. Just curious, because I was thinking about one for a project I'm working on - I also like the way they look. Is this a good vintage solution to a modern problem?
  14. fish3495
    Joined: Apr 25, 2006
    Posts: 111


    I heard that there was no lead in gas until wwII. All pre-war valves sat on hardened seats. There was alot of talk about this in WoodenBoat magazine.
  15. DLipp
    Joined: Feb 11, 2004
    Posts: 56

    Member Emeritus

    I am just a young pup, but my experience with Leaded gas is it also lasts longer. Meaning sitting in a can and not breaking down or varnishing. I have used leaded race gas that was sitting for over a year and a half and it still ran fine in my motorcycle and smelled the same. I know with pump gas you can't have it sit more than six months and it starts to smell bad and doesn't work as well.

    My 2 cents.
  16. RopeSeals???
    Joined: Jul 2, 2007
    Posts: 444


    The oldtimers back home swore by the Marvel Inverse Oiler...
  17. Jalopy Jim
    Joined: Aug 3, 2005
    Posts: 1,867

    Jalopy Jim

    If you use Av gas or Ag gas on the street and get caught, The fine is pretty heafty for avoiding both state and fed gas tax.
    Gas is dyed for its intended use.
  18. propwash
    Joined: Jul 25, 2005
    Posts: 3,858

    from Las Vegas

    I have avgas (100LL) at the small field where I keep the plane, but it's more expensive per gallon than the stations here in town (Rebel) that have a 100oct "racing gas". Three of my cars will not run well without at least 100oct, and back when (on the west coast here) we still had "Chevron Supreme" ..the WHITE pump (leaded - about 108 RON)...the Cobra ran like gangbusters...I sucked into filling it up once with Shell while Enzo was doing their commercials....had to drain it....pinged....ran horribly...refilled with Chevron Supreme...right back to wonderfulville.

    "If at first you don't succeed, call in an airstrike"

  19. dotcentral
    Joined: Apr 28, 2005
    Posts: 116


    I had a 70 F100 w/302 with recessed valves, it does happen.

    Walmart sells lead for use in offroad vehicles. Comes in a container like the "stabil" gas preservative stuff.
  20. sawbuck
    Joined: Oct 14, 2006
    Posts: 1,887

    from 06492 ct

    i heard they used to call it WHITE GAS ?
  21. old dirt tracker
    Joined: Sep 20, 2006
    Posts: 1,002

    old dirt tracker
    from phoenix

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