Is Leaded Fuel better than Unleaded? Let's find out!

  • Published on: 12 August 2019
  • Is leaded fuel better as than unleaded gasoline? 100 octane low lead aviation fuel (100LL avgas) is tested in several engines: Wankel rotary, see through piston engine, fuel injected generator, small engine for lead build up, and Predator 212 for top speed performance. A special thanks to Matt from the Warped Perception YouTube channel for loaning his rotary engine to me! Please check out his channel. His videos are absolutely amazing!!! Also, thanks to all the viewers that requested this video. Thank you very much for supporting the channel by watching the commercials and through Patreon support.

    This video is only for entertainment purposes. If you rely on the information portrayed in this video, you assume the responsibility for the results. Project Farm LLC
  • Runtime : 10:46
  • Seafoam additive marvels mystery oil project farm amazon basics oil mobil 1 synthetic oil leaded gas unleaded gas unleaded gas vs premium unleaded petrol unleaded gasoline petrol leaded petrol 100LL aviation fuel


  • M Biohoo
    M Biohoo   18 hours ago

    Can we all just agree that spitting out leaded anything into our breathable airspace is a bad idea?

  • David Grisez
    David Grisez   21 hours ago

    Interesting tests, it looks like 100ll Avgas will work in gasoline engines that do not have catalytic converters or oxygen sensors in the exhaust. However the big problem with tetraethyl lead is that this substance is toxic, it is good that its use as octane booster in gasoline was discontinued. I am old enough to remember when gasoline pumps had a label on them that read, "For Use as a Motor Fuel Only contains Lead".

  • Jadon Hargrove
    Jadon Hargrove   1 days ago

    3:40 it said one hour later? You spend a lot of effort on your videos!

  • Gary Rzeszutek
    Gary Rzeszutek   1 days ago

    I once ran 140 octane AV gas in my 11:25 compression 350 cu Camaro. I didn't notice any appreciable gain in power, but I did notice that my engine got to 220 temp very quickly. not worth the cost.

  • Ariana Diego
    Ariana Diego   1 days ago

    My understanding of Av-gas is that it is for designed higher compression engines and as such is a higher octane...My 74' Chevy Cheyene Super 4x4 used to love Av-gas; A 350, 30 over with 10:1 compression, headers and no catalytic converter. Av-gas would make it purrrrr...

  • AdamBatchelder
    AdamBatchelder   1 days ago

    So your low compression test motors don't really bennifite from 100 octane gas other than its ethanol and alcohol free. If you where to test it in a higher compression /performance motor like 11 or 13 to 1 you would see a big difference in performance.

  • KimballCody
    KimballCody   1 days ago

    I don't think those are "clumps of lead" more like previous deposits that the 100LL is cleaning out

  • Buttt_Burglar 64
    Buttt_Burglar 64   3 days ago

    How did I miss this 🤷‍♂️🤷‍♂️ great video bud. Keep up the great work. Love your videos always interesting.

  • richard easther
    richard easther   4 days ago

    How about trying diy copper head gasket and see how many times it can be re used if at all

  • LDN Wholesale
    LDN Wholesale   4 days ago

    The fuels are different by volume. Low lead avgas will make a bit less power and use a bit more fuel. This in a 11.2-1 racing engine. The engine you thought was too fat was actually too lean.Though ethanol fuels have a different volume too. Factory efi computers adjust to E10. But E85 is different injectors and pump plus computer. And methanol [race use] is different again,Same with carbs, eg holley make an E85 carb, a methanol carb as well ofcourse as petrol carbs. Which are quite different when you look close. You can modify a petrol carb for both of the alcohol fuels but always a compromise.

  • Barış Özbek
    Barış Özbek   4 days ago

    This is nonsense.Unleaded fuel is a poison which is sold long to us as "there is no problem your health"and who prepare this report is a devil.

  • 69aussieguy
    69aussieguy   5 days ago

    Not to be used as a "skin cleanser". That brings back memories, lead fuel was great for removing oil and grease from your hands and it didn't leave them dry and stinky, unlike modern fuel.

  • Lord Colin
    Lord Colin   6 days ago

    No data sheet is going to tell me I can't wash my face with gasoline.

  • Shadow Paw
    Shadow Paw   6 days ago

    I went into this, not even caring if the leaded fuel was better, since lead is... well.. LEAD.

  • James Copeland
    James Copeland   6 days ago

    1st off... yet another great video! Kudos!You won't see much (if any) gain in performance with these engines. They simply aren't designed to get the most out of the fuel. Higher octane fuels require significantly higher compression, ignition advance, and atomization to achieve their potential gains. There is a slight advantage in power by volume, as there is no ethanol in the aviation fuel... but without a properly tuned engine, that advantage is unattainable.

  • Leo Karasinski
    Leo Karasinski   6 days ago

    Leaded fuel and unleaded fuel (pre ethanol) are exactly the same minus the lead. All the lead did was accumulate on the valve seats to act as a cushion to keep the valves from eating into the cylinder head. Once they started using hardened valve seats, theres no need for lead. Av gas, vs automotive gas is a different comparison. Av gas I much better filtered and qc is much better.

  • Z71Silverado14
    Z71Silverado14   1 weeks ago

    Curious if the Race fuel you can buy that is 103 octane could potententialy have any cleaning proporties to it.

  • Branden Scott
    Branden Scott   1 weeks ago

    I ran avgas in my car for a time and ruined my catalytic converters and O-2 sensors. It leaves a white residue near the tailpipes after awhile

  • Michael
    Michael   1 weeks ago

    I want to see a engine use melted Vaseline as engine oil!!!!

  • jdlech
    jdlech   1 weeks ago

    Couple of thoughts here. We had been using leaded gasoline for decades with no ill effect on spark plugs. In fact, engine blocks were made of a lower grade, softer steel back then. The lead was meant to fill in the scratches as they were made inside the cylinder walls. Since we removed the lead, engine blocks are now made of higher grade steel to reduce the problem. That's also why engines today can last 2 1/2 times longer under comparable use.So leaded gasoline should not harm small engine blocks or the spark plugs. In fact, there's a good chance it will make the engine block last longer. But you're still throwing lead into the air for everyone to breathe and cause neurological and developmental disorders. So please refrain. I prefer everyone's kids to be as "normal" as possible.Just my preference.It's been a while, but I believe I saw a product that allows you to add lead to modern gasoline for classic cars.And I figured out why your engine was running rough - the blue fuel you're using is 100 octane, while regular motor gas is 87 or 89 octane. So it would naturally run a bit "fuel rich". Instead, you should look for that lead additive for regular motor gasoline or perhaps cut the blue stuff with an inert (noncombustible) additive by about 10%, which would put it roughly on par with premium gasoline.And the white powder you found all over the spark plugs proves my theory. Combustion was too hot, and the "roughness" was actually the piston being driven too hard. Run the test again after cutting the fuel by about 10-13% and I'll bet the engine will calm right down and that gray residue will all but disappear. The inside of the cylinder should come out looking much better too.

  • KendrickMan
    KendrickMan   1 weeks ago

    Would mushrooms work better than bananas as oil since they start with more water content to begin with, or worse because there are less actual fats?

  • KendrickMan
    KendrickMan   1 weeks ago

    Have we done moonshine as gasoline yet?

  • John Doe
    John Doe   1 weeks ago

    Lead causes a fuller cleaner burn. Also, make you beat the shit out of your wife and not know why.

  • Vox Deus
    Vox Deus   1 weeks ago

    The strangest and best channel on youtube! Did you ever do a WD-40 in the crankcase video?

  • Vox Deus
    Vox Deus   1 weeks ago

    Always be very careful when around tetraethyl lead. Seriously poisonous stuff. Couls some of the differences be due to using high octane gas in a low compression engine? My VTC 1100 twin is low compression and it runs terrible on high octaine gas.

  • Satyanand Persaud
    Satyanand Persaud   1 weeks ago

    Im surprised the fuel injectors didnt get clogged with the av fuel..

  • richard kramer
    richard kramer   1 weeks ago

    lead was used to lubricate the valve train. octane is a pre-ignition inhibitor for high compression, or way advanced timing for performance applications. advance the timing in your go cart, it will go faster!!

  • Chris Katko
    Chris Katko   1 weeks ago

    What material do you use for your transparent rig? Do you have to change out the viewing glass every time, or every so many hours? thanks

  • David Darby
    David Darby   1 weeks ago

    Sooo, what is the answer? Is leaded fuel better or worse than unleaded?

  • The Suburban Experimentalist

    I was watching your great videos, and I did watch this, and chose not to comment, but then saw the title and found out it was misleading. In old cars, with old valve guides and valve seals, the leaded fuel was a lubricant. Now a days, with newer engines, there is no benefit to leaded fuel, and leaded fuel puts lead in the atmosphere. Now as far as leaded fuel, older cars DID in fact run noticeably better on leaded fuel. They had more power. Now ethanol fuel and non ethanol fuel, there probably isn't much difference if they are new. However, as 10% fuel ages, the alcohol makes them absorb moisture and it breaks down much faster! The thing is, when you get something from the gas station pump, you have no idea how fresh the fuel is... Just my two cents!

  • MrClassiccarenthusia
    MrClassiccarenthusia   1 weeks ago

    Peter Griffin envisioned that his pickup truck would take to the sky on aviation fuel of an unknown grade.Project Farm shows us that you only gain 2mph on a short run. Perhaps also a slight increase in MPG as a result of the leaning out of the mixture.Project Farm 1 - 0 Peter Griffin

  • YouTube5000
    YouTube5000   2 weeks ago

    Is there any difference between 87, 89 and 91 gasoline? I’ve seen other videos but if anyone can make an in-depth video about this it’s you.

  • Mr Phobos
    Mr Phobos   2 weeks ago

    It would be awesome to see the rotary engine run on gasoline vapor

  • Bill Payne
    Bill Payne   2 weeks ago

    test the Fuel Efficiency on the Rotary engine at high rpm

  • Average joe
    Average joe   2 weeks ago

    Love See through engines. Its like watching a fire burn

  • Moe Shouse
    Moe Shouse   2 weeks ago

    Why ethylene dibromide is added to leaded gasoline?Somenath Chatterjee, Process engineerEthylene bromide has anti knocking properties and hence was added to leaded petrol for better anti knocking engine performance. However with ban on leaded petrol, the use of Ethylene bromide is also removed from gasoline. ethylene bromide (C2H4Br2) | chemical compound and Lead TetraEthyl and MTBE .Ethylene bromide also finds use as pesticides and reagents. Ethylene bromide has several documented health risks, however the study is mostly limited to animal trials. 1,2-Dibromoethane

  • Frotax Frotax
    Frotax Frotax   2 weeks ago

    Smells good. Just like any race fuel. I run it in my turbo 2 stroke sleds. About 12 lbs of boost.