Old car drivers drive cars that need additives in the gas. The lead was a lubricant, and old engines ran better, and longer, on leaded gas.
They didn’t just add lead because it made the gas prettier; there was a reason. I would suppose that today there are other additives that can reproduce the lubricating effects for those old cars, but old car hobbyists are niche and you’re not going to find those products at Walmart, whereas there’s always a local airport somewhere nearby.
I’m not defending leaded gas, but I think vintage car enthusiasts do it not because they’re being stupididly misinformed and contrarian, but because they’re trying to keep their engines running well.
The lead was a lubricant, and old engines ran better, and longer, on leaded gas.
There were two issues. First, tetraethyl lead increased the effective octane level. That, in turn, reduced the probability of pre-ignition, e.g., the fuel-air mixture igniting before the compression cycle was completed. Higher octane allows for higher compression, which is more efficient. The other issue was the valves specifically; the lead provided a ‘cushion’ between the valves and the valve seats, which minimized valve wear.
The octane issue is easily solved by both better refining or by adding alcohol. It was known that you could add alcohol to gas to improve octane rating even when TEL was first added, but TEL could be patented, and alcohol couldn’t. The valve issue has largely been solved by better metallurgy and manufacturing.
The one are where it hasn’t been solved is small aircraft. Some small planes still use leaded gas, and it’s mostly for the octane boost. TEL can give them a better octane rating than alcohol or better refinement can, which allows them to operate at much high compression. Take that away, and the engines are too underpowered to keep the plane in the air. Over 150,000 small airplanes still use leaded AvGas; thankfully, newer turboprop planes and all jet planes mostly use Jet A or Jet B fuel, which is closer to kerosene.
In theory, I think that you could convert older cars to run on unleaded fuels, but you would need new parts rather than OEM.
While putting in a new generator is absolutely a better idea, that means it’s not the original car. Plenty of classic car (and computing and video game and music and any hobby) enthusiasts run original hardware on purpose. Where’s the fun in building an Apple IIe if you use a flash drive instead of the hard drive? Where’s the soul in listening to The Four Tops on a digital recording instead of the vinyl master? Why play Sega on a flash cart instead of the original cartridges? Why drive a classic Civic if you’re trying to drop a K20 in there?
New stuff is objectively better. A 4Cyl Mustang makes more power these days than a V8 from the 90s, more so for older models. You have to be a little irrational to put that amount of time into running something just because it’s older.
Old car guys are still bitter over unleaded gas. Some will drive to airports to buy the leaded stuff.
Old car drivers drive cars that need additives in the gas. The lead was a lubricant, and old engines ran better, and longer, on leaded gas.
They didn’t just add lead because it made the gas prettier; there was a reason. I would suppose that today there are other additives that can reproduce the lubricating effects for those old cars, but old car hobbyists are niche and you’re not going to find those products at Walmart, whereas there’s always a local airport somewhere nearby.
I’m not defending leaded gas, but I think vintage car enthusiasts do it not because they’re being stupididly misinformed and contrarian, but because they’re trying to keep their engines running well.
There were two issues. First, tetraethyl lead increased the effective octane level. That, in turn, reduced the probability of pre-ignition, e.g., the fuel-air mixture igniting before the compression cycle was completed. Higher octane allows for higher compression, which is more efficient. The other issue was the valves specifically; the lead provided a ‘cushion’ between the valves and the valve seats, which minimized valve wear.
The octane issue is easily solved by both better refining or by adding alcohol. It was known that you could add alcohol to gas to improve octane rating even when TEL was first added, but TEL could be patented, and alcohol couldn’t. The valve issue has largely been solved by better metallurgy and manufacturing.
The one are where it hasn’t been solved is small aircraft. Some small planes still use leaded gas, and it’s mostly for the octane boost. TEL can give them a better octane rating than alcohol or better refinement can, which allows them to operate at much high compression. Take that away, and the engines are too underpowered to keep the plane in the air. Over 150,000 small airplanes still use leaded AvGas; thankfully, newer turboprop planes and all jet planes mostly use Jet A or Jet B fuel, which is closer to kerosene.
In theory, I think that you could convert older cars to run on unleaded fuels, but you would need new parts rather than OEM.
I ones I know are putting it in new generators.
While putting in a new generator is absolutely a better idea, that means it’s not the original car. Plenty of classic car (and computing and video game and music and any hobby) enthusiasts run original hardware on purpose. Where’s the fun in building an Apple IIe if you use a flash drive instead of the hard drive? Where’s the soul in listening to The Four Tops on a digital recording instead of the vinyl master? Why play Sega on a flash cart instead of the original cartridges? Why drive a classic Civic if you’re trying to drop a K20 in there?
New stuff is objectively better. A 4Cyl Mustang makes more power these days than a V8 from the 90s, more so for older models. You have to be a little irrational to put that amount of time into running something just because it’s older.