Today I had the 66 out testing the newly converted A/C. That seems to work pretty well with the 90 degree heat today. I noticed the gas gauge going down today but was really busy so put off filling up because gauge still moved from far left. Big mistake. I ran out this evening and had to have lovely wife bring gas. I could see her grin. Of course she brought me my lawnmower gas which is 87 or 89 octane. Well when I shut car off at next stop, I thought the old girl was a diesel. I had to turn off and on several times to get it to quit. After that appointment, I went to fill up. At station same problem and a backfire that sounded like a big gun. Filled with $30 of 93 Octane as usual and runs like a new one. I never knew the octane could make that much difference. I learned a lesson that I'll not soon forget Matt Hopkins 66 Crown with almost full tank of 93 75 Lebaron 92 Imperial