Leaded gas better than premix?
 

What do yall think? Lets open the discussion.
olddragger

technically speaking yes.

but its very deadly to us and all living being.

We could just put a sticker inside the gas door with a warning:D: The question is a good one though. Wouldn't high octane leaded gas or more commonly, race gas, be very beneficial in cooling, lubrication, and more important, LONGEVITY??

thats my point you really believe leaded gas is dangerous? Think before you answer
damn i just hijacked my OWN thread!
od

Are you living in the 60's?
Christ, what a bunch of nonsense.

Lead is NOT oil. Where do you get the idea that one is interchangeable with the other?

Is mayonnaise better than mercury?

OD never said lead is oil, he is saying is lead better than premix. :)

Read you n00b ! :) :lol2:

Mayonnaise IS better than mercury, but way more fattening. The problems with leaded gas in the 8 would be many. Destroys o2 sensors in fairly short order as well as the cats. The plugs would have to be replaced also. But in the '60s we are not. No cats? No prob. Deep pockets for plugs and o2's?? No prob. The 3 pluses for leaded gas would be...its increased cooling due to anti-detonation. Leaded gas was used to lubricate valve seats(i know i know) i.e rotor seals & combution chamber. And the high octane adds to cooling also, as well as the ability to mod the schnikes out of it with no constraint on octane!!! Mercury on the other hand, will cause DRT. Dead Right There.

jeff i was racing in the 60's! Hell I was racing in the 50's:)
Lead was used to lubricate areas that oil didnt get to among other things that STR8 said(thanks).
I understand that it can harm the cat--but i think the o2 sensors are safe enough.
I think it may be worth a look see if you are Fi or if you track a lot. And a serious look see if you are FI AND track! Look at the leaded race gas that is available.
At 10/1 comp ratio(without any carbon buildup present!!) even 93 octane is borderline.
better lube for the seals, and additional detonation help sounds good to me.
this needs talking about.
olddragger

100 Octane unleaded is available. Why buy leaded gas for the higher octane levels. The are no valves in a rotary that need to be lubricated. Lead will also leave deposits that when built up, could prematurely wear out the rotor seals. Just like carbon. I remember having spark plugs that were lead fouled.

agreed --do not want to run a leaded gas all the time. But it is an interesting subject.
May use for track only
OD

Won't lead destroy your Catalytic converter too?

Um, tetraethyllead is an anti-knock package; pre-mix is to deliver lubrication. Two totally different things. So when you ask is one better than the other, the question remains, "For what?"

i run 2 gallons of 100LL just once a year and drive the wheels off the car to clean it out as well.
but the only reason i do it is b/c its sumped fuel from the airport i work at..
and i live in a small town so of course noone cares

Do you guys recommend premixing with low fat mayo, or the regular stuff?

Leaded gasoline protected some older car engines from wearing down by covering soft engine parts with lead-containing material.

There are two major problems with using leaded fuel.

1) Lead is extremely toxic, and causes mental retardation in children. Lead oxide from car exhaust accumulates in soil near roads, and children can get it on their
hands from playing outside. They then ingest it, and it causes its damage.

2) Leaded gasoline ruins automobile catalytic converters. As a result of
these two problems, lead in gasoline has been banned in the U.S.

So i say Premix is better

oh THATS the reason I am what I am!!
The truth is something like this---no one wanted smog--one way to get rid of it was the cats and unleaded gas etc--big business could make even more money doing it this way---so no more leaded gas---dont believe everything that is spoon fed to the public.
yep lead is not good to directly eat or breath in. it is still used in many 3nd world country's. No major outbreaks of lead related damage are occurring. Lead in paint is much more of a concern and with the outsourcing of stuff dont be so sure than the paint you buy is lead free. Read some reports about Sherman Willams paints in Mexico.
Lead DOES lubricate--thats one of my points.
Pre mix REDUCES octane and at 93 or 91 you are already at the bare minimum required AND hope you dont get a bad batch.
All of this is for discussion only--i will run leaded gas at the track but not on the street-costs too much
OD

There was a show on the History Channel last night about lead, I would watch that before running leaded gasoline. And plus there are other additives out there that you can use instead of lead

Just how much does premix reduce octane??? I do know that you've talked about using much higher amounts of premix like RB on track cars, which increases hp, but I think most of us use about 5 oz of premix.

Here you go REDLINE has a Lead Substitute

Prevents valve seat recession in vehicles designed to use leaded fuels. Red Line Lead Substitute prolongs the useful life of these engines, cleans carburetor deposits and injectors and will not damage catalytic converters. For racing, marine or off-road use only.

Invasion is correct - it is NOT a lubricant - it only 'prevents valve recession'.

The lead coats everything, including the valve seats. This prevents the high temperature 'welding' effect that eats the seat away, building up the material on the valve itself. Parts coated in lead won't stick together, kind of like primitive anti-seize compound, not a lubricant.

Lead compounds on sliding surfaces (as in a wankel) are the opposite of a lubricant - the parts would slide better without them.

S

I've always been impressed that (1) was discovered at the exact time that the auto makers wanted to use catalytic converters. What a fortuitous coincidence! :Eyecrazy:

Ken

That would be my thought. It would create deposits on the rotor housing that would wear away the seals.

Good points--didnt rotary engine exist before leaded gas was done away with?
not in the mass we speak of now but they were around and they were running leaded gas?
also doesnt aircraft still use leaded fuel?
i cant find where lead coats everything it is only affecting the plugs and they can be cleaned?
No doubt lead is bad for the health--it is just now a days, i dont trust any big business telling the public what is the "best" thing to do.
OD

You might as well start eating lead paint chips if you want to use leaded gasoline. Then tell me how your health was affected by lead

Slightly off topic and only -1/2 serious:

Wasn't there some oil that was marketed some time ago with Molybdenum that suggested that the added metal complexes acted like tiny ball-bearings? (Just off the top of my head I would call "bullshit" on the concept, but maybe they had something?) I think it was called Slick 50.

Well, there you go...premix with some 2-stroke slick 50 and you could have your cake and eat it too.

As for using Leaded gas to protect from valve damage, how many valves does your RENISIS have?