[Quick Shot]

My Grandfather (RIP) contention was that the smog equipment cut out 1/2 the pollutants per gallon of gas, but reduced the MPG by half. As the distance to work was the same the pollution was unchanged.

[PeterPrinciple]

My Grandfather (RIP) contention was that the smog equipment cut out 1/2 the pollutants per gallon of gas, but reduced the MPG by half. As the distance to work was the same the pollution was unchanged

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it was obvious even then that we should measure pollution per mile but that meant thinking skills..............

[11th Commandment]

Very true. In the seventies we use to disconnect that horrid smog pump that took 10 hp off the engine.

Today the main improvement is the electronic ignition system and computer timing that reduce pollution.