Fuel,air,electrical,fuel in the 80`s is better than the water we run now,fuel in the sixties(lead) better than racing fuel now.Autolites in my big blocks since the 70`s,ran ngk`s only in my motorcycles,now will run in my bee,still correct heat range,gap,fuel and air will run for long time,oil fired or fuel deluted won`t,had to say something after reading this post this far......amazing but autolites run longer with oiling problem than champs but champs still make the best race plug OK good night