u can use 93-105 octane just dont use leaded fuel..it loads up o2 sensors and u got 4 to replace at over 100.00 each...remember any octane your car does not need it slows down the burn ratio of the fuel.. if ur turbo or super charged u might more octane but N/A stock cyl head pressure and compression with stock timing 93 should be more than sufficicent.....

 

I don't even know where anyone would get leaded fuel anymore, let alone anyone dumb enough to put it in their tank.

 

Piston aircraft run on 100 Low Lead. So you can get leaded at airports.