Leaded vs. Unleaded

Interesting video. I was surprised to see how fast lead deposits built up in that lawn mower. To think of all the small engines I tore apart without wearing gloves or washing my hands afterwards...kinda explains a lot [drools on keyboard].

I was managing a Hess gas station back when unleaded was introduced. We pumped regular leaded (yellow), premium leaded (red) and unleaded (white).

I forget what the amount of lead was required to take regular gas to 100 octane...I believe it was as little as teaspoon per 55 gallon drum. But that was a long time ago, I could be misremembering what they taught us.
 
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