I'm expecting retail gas stations to be common for the next 20-40 years, with some density reduction towards the middle of that period is what I'm saying more o

I'm expecting retail gas stations to be common for the next 20-40 years, with some density reduction towards the middle of that period is what I'm saying more or less. To say leaded fuel is still available is a little bit of a misnomer, in the states anyhow, its not legally available as a road fuel, nor is a TEL additive - there are lead substitutes, but they're potassium I think, largely to prevent valve seat wear. As far as I know, low octane unleaded fuel has always been available, you could always get a 'regular' grade gas without TEL, and premium fuel was marketed as with TEL.