You opened a can of worms. In other threads about which fuel to use most of the people that replied in the forum seem to be satisfied with 87. There are a handful that prefer 93. I don't have a Wrangler yet, but I'm a believer in running the highest octane possible to keep the fuel lines, injectors, and engine clean. Also, my experience with other vehicles is that I get increased power and improvec mpg.
For me when I do order, I don't know if I want the Turbo 2Litre, but the 4 cylinder engines seem to be very responsive to high octane.
This engine is designed to meet all emission regulations, and provide satisfactory fuel economy and performance when using high-quality unleaded “Regular” gasoline having a posted octane number of 87 as specified by the (R+M)/2 method. For optimal performance the use of 91 or higher octane “Premium” gasoline is recommended in these engines.
This engine is designed to meet all emissions regulations and provide excellent fuel economy and performance when using high-quality unleaded “Regular” gasoline having an octane rating of 87 as specified by the (R+M)/2 method. The use of higher octane “Premium” gasoline will not provide any benefit over “Regular” gasoline in these engines.
No engine damage using 87 octane, just reduced performance and MPG.