The Z just got 18mpg, the G35 averages 19-20mpg. But then again, if the G35 or Camry were stick I might enjoy them more. Also, the $0.20 more you pay for 91 is a much better deal now than ever before. At $4.80 for 91 octane, it costs only 4.3% more than 87. Before when gas was $2.50 for 91 octane, it was 8%. I hope no one at the gas stations realize this...