I have a vintage Mustang that uses leaded fuel. The problem is that in Canada leaded gas is illegal. I used to add Lead Substitute to my fuel, but I was told that you do not need to do this anymore. Apparently, the new high-octaine gasolines have special additives that make lead substitute unnecessary.
Can anyone tell me whether this is true or not? Also, lead gas was used before my time, so I really don't know much about it. What is the benefit of it?