I just filled my 60 with a tank of "non-oxenigated" (sp) 93 octane gas. I didn't know it existed, or for that matter that oxenigated gas was bad for old cars. The Shell station I purchased it from had a sign on the pump that said it was specifically for old cars, and I think outboard motors. It could be my imagination ,but the 413 just plain purrs sipping that stuff! BTW this stuff was a nickel more a gallon than their other 93 octane .gas. 156.9 if memory serves me correct. Clay Smith 67 Crown Coupe 60 Custom >