Lead substitute
#1
Race Director
Thread Starter
Lead substitute
I was always told since they stopped selling lead gasoline at the gas stations, to add a bottle of lead substitute whenever filling up the tank.
With today's gas, I know it doesn't have lead but do you still need to add the bottle of lead substitute?
TIA.
With today's gas, I know it doesn't have lead but do you still need to add the bottle of lead substitute?
TIA.
#2
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At a 115K miles on my rebuilt SB I have never used any such additive, nor have I been told it's the thing to do. No need for it! Dennis
#3
Race Director
If you're constantly on it hard, high engine loading, high rpms, it might be cheap insurance - maybe just for peace of mind.
Most studies have shown that it isn't really needed.
Tetraeythl lead was originally introduced as an octane booster when compression ratios in engines were increased. The issue of valve wear was secondary. Today's gasolines get there octane rating from the refining techniques.
#4
Race Director
You can also buy real tetraethyl lead instead of the substitute. It just isn't legal for use on the road. But many folks do use it.
Not needed for typical use in these cars, but it does work. Available from many sources, this is just one. Google the name for other suppliers.
http://www.ebay.com/itm/Octane-Supre...9UucLQ&vxp=mtr
Larry
Not needed for typical use in these cars, but it does work. Available from many sources, this is just one. Google the name for other suppliers.
http://www.ebay.com/itm/Octane-Supre...9UucLQ&vxp=mtr
Larry
Last edited by Powershift; 04-28-2016 at 03:05 PM.
#5
Team Owner
You don't need any fuel additive. If you're worried about it then send me the money you would have spent on the additive and I will send you a weekly email stating, "...Everything is OK!".
The results will be the same only I'll be a little richer.
The results will be the same only I'll be a little richer.
#6
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With unhardened valve seats, lead additive/substitute will help if you A. pull a trailer, or B. spend most of your time at 4000 rpm or greater. I use TEL130 in my '65 GTO for octane boost, not for valve seats. For normally driven old cars, no gas additive is really needed to protect the valve seats.
#7
Team Owner
Short answer --- NO
#8
Le Mans Master
Where's MikeM?
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I throw a bottle of this in every fillup
A well dress gentleman with a handlebar mustache says it works like magic.......
A well dress gentleman with a handlebar mustache says it works like magic.......
#12
Race Director
#13
Race Director
With unhardened valve seats, lead additive/substitute will help if you A. pull a trailer, or B. spend most of your time at 4000 rpm or greater. I use TEL130 in my '65 GTO for octane boost, not for valve seats. For normally driven old cars, no gas additive is really needed to protect the valve seats.
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No
#15
Safety Car
Most of the gasoline additives are snake oil. Maybe.
There is almost no decent research on any of these additive. All of the evidence is anecdotal.
Technically you can't even say they're all worthless because that evidence is lacking as well
My latest article on gasoline.
Richard Newton
There is almost no decent research on any of these additive. All of the evidence is anecdotal.
Technically you can't even say they're all worthless because that evidence is lacking as well
My latest article on gasoline.
Richard Newton
Last edited by rfn026; 04-29-2016 at 08:49 AM.
#16
Team Owner
#17
Pro
Due to my '65 fuelie's high compression, I use 100LL airplane gas for the octane, although the lead can't hurt. The downside: $5.00+/gallon, but my baby deserves it. It also stores well for a long time. My car sometimes pings on the current high test gas, and it's well known that it doesn't store well due to absorption of water. When I have to use it, I add Wild Bill's Octane Supreme 130.
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Kind of reminds me of Brighto. The 3 stooges used that for everything